Moore v. Harper

600 U.S. 1

• Court: Supreme Court of the United States
• Decided: June 27, 2023
• Docket: 21-1271
• Status: Published

Opinion

(Slip Opinion) OCTOBER TERM, 2022 1

Syllabus

NOTE: Where it is feasible, a syllabus (headnote) will be released, as is being done in connection with this case, at the time the opinion is issued. The syllabus constitutes no part of the opinion of the Court but has been prepared by the Reporter of Decisions for the convenience of the reader. See United States v. Detroit Timber & Lumber Co., 200 U. S. 321, 337.

SUPREME COURT OF THE UNITED STATES

MOORE, IN HIS OFFICIAL CAPACITY AS SPEAKER OF THE NORTH CAROLINA HOUSE OF REPRESENTATIVES, ET AL. v. HARPER ET AL.

CERTIORARI TO THE SUPREME COURT OF NORTH CAROLINA

No. 21–1271. Argued December 7, 2022—Decided June 27, 2023 The Elections Clause of the Federal Constitution requires “the Legisla- ture” of each State to prescribe the rules governing federal elections. Art. I, §4, cl. 1. This case concerns the claim that the Clause vests state legislatures with authority to set rules governing federal elec- tions free from restrictions imposed under state law. Following the 2020 decennial census, North Carolina’s General Assembly drafted a new federal congressional map, which several groups of plaintiffs chal- lenged as an impermissible partisan gerrymander in violation of the North Carolina Constitution. The trial court found partisan gerry- mandering claims nonjusticiable under the State Constitution, but the North Carolina Supreme Court reversed. Harper v. Hall, 380 N. C. 317, 868 S. E. 2d 499 (Harper I). While acknowledging that partisan gerrymandering claims are outside the reach of federal courts, see Rucho v. Common Cause, 588 U. S. ___, ___, the State Supreme Court held that such questions were not beyond the reach of North Carolina courts. The court also rejected the argument that the Federal Elec- tions Clause vests exclusive and independent authority in state legis- latures to draw federal congressional maps. The court enjoined the use of the maps and remanded the case to the trial court for remedial proceedings. The legislative defendants then filed an emergency ap- plication in this Court, citing the Elections Clause and requesting a stay of the North Carolina Supreme Court’s decision. This Court de- clined to issue a stay, but later granted certiorari. After this Court granted certiorari, the North Carolina Supreme Court issued a decision addressing a remedial map adopted by the trial court. Harper v. Hall, 383 N. C. 89, 125, 881 S. E. 2d 156, 181 (Harper II). The North Carolina Supreme Court then granted the legislative 2 MOORE v. HARPER

defendants’ request to rehear that remedial decision in Harper II. The court ultimately withdrew the opinion in Harper II concerning the re- medial maps and overruled Harper I, repudiating its holding that par- tisan gerrymandering claims are justiciable under the North Carolina Constitution. The court dismissed plaintiffs’ claims but did not rein- state the 2021 congressional plans struck down in Harper I under the State Constitution. This Court has entertained two rounds of supple- mental briefing on jurisdictional questions in light of the state court’s rehearing proceedings. Held: 1. This Court has jurisdiction to review the judgment of the North Carolina Supreme Court in Harper I that adjudicated the Federal Elections Clause issue. A corollary to this Court’s jurisdiction over “Cases” and “Controversies” is that there must exist a dispute “at all stages of review, not merely at the time the complaint is filed.” Genesis HealthCare Corp. v. Symczyk, 569 U. S. 66, 71 (internal quotation marks omitted). The North Carolina Supreme Court’s decision to withdraw Harper II and overrule Harper I does not moot this case. Prior to the appeal and rehearing proceedings in Harper II, the court had already entered the judgment and issued the mandate in Harper I, and the legislative defendants acknowledged that they would remain bound by Harper I’s decision enjoining the use of the 2021 plans. When the North Carolina Supreme Court “overruled” Harper I as part of the rehearing proceedings, it repudiated Harper I’s conclusion that parti- san gerrymandering claims are justiciable under the North Carolina Constitution. But the court did not purport to alter or amend the judg- ment in Harper I enjoining the use of the 2021 maps. Were this Court to reverse Harper I, the 2021 plans would again take effect. Because the legislative defendants’ path to complete relief runs through this Court, the parties continue to have a “personal stake in the ultimate disposition of the lawsuit” sufficient to maintain this Court’s jurisdic- tion. Chafin v. Chafin, 568 U. S. 165, 172 (internal quotation marks omitted). This Court also has jurisdiction to review the judgment in Harper I under 28 U. S. C. §1257(a), which provides that jurisdiction in this Court extends to “[f]inal judgments . . . rendered by the highest court of a State in which a decision could be had.” Cox Broadcasting Corp. v. Cohn, 420 U. S. 469, identified categories of cases in which a deci- sion of a State’s highest court was considered a final judgment for §1257(a) purposes despite the anticipation of additional lower court proceedings, including “cases . . . in which the federal issue, finally de- cided by the highest court in the State, will survive and require deci- sion regardless of the outcome of future state-court proceedings.” Id., at 480. Harper I is such a case. Because subsequent proceedings have Cite as: 600 U. S. ____ (2023) 3

neither altered Harper I’s analysis of the federal issue nor negated the effect of the Harper I judgment striking down the 2021 plans, that is- sue both has survived and requires decision by this Court. Pp. 6–11. 2. The Elections Clause does not vest exclusive and independent au- thority in state legislatures to set the rules regarding federal elections. Marbury v. Madison, 1 Cranch 137, famously proclaimed this Court’s authority to invalidate laws that violate the Federal Constitu- tion. But Marbury did not invent the concept of judicial review. State courts had already begun to impose restraints on state legislatures, even before the Constitutional Convention, and the practice continued to mature during the founding era. James Madison extolled judicial review as one of the key virtues of a constitutional system, and the concept of judicial review was so entrenched by the time the Court de- cided Marbury that Chief Justice Marshall referred to it as one of so- ciety’s “fundamental principles.” Id., at 177.. The Elections Clause does not carve out an exception to that fun- damental principle. When state legislatures prescribe the rules con- cerning federal elections, they remain subject to the ordinary exercise of state judicial review. Pp. 11–26. (a) In Ohio ex rel. Davis v. Hildebrant, 241 U. S. 565, this Court examined the Elections Clause’s application to a provision of the Ohio Constitution permitting the State’s voters to reject, by popular vote, any law enacted by the State’s General Assembly. This Court upheld the Ohio Supreme Court’s determination that the Federal Elections Clause did not preclude subjecting legislative acts under the Clause to a popular referendum, rejecting the contention that “to include the ref- erendum within state legislative power for the purpose of apportion- ment is repugnant to §4 of Article I [the Elections Clause].” Id., at 569. And in Smiley v. Holm, 285 U. S. 355, this Court considered the effect of a Governor’s veto, pursuant to his authority under the State’s Con- stitution, of a congressional redistricting plan. This Court held that the Governor’s veto did not violate the Elections Clause, reasoning that a state legislature’s “exercise of . . . authority” under the Elections Clause “must be in accordance with the method which the State has prescribed for legislative enactments.” Id., at 367. The Court high- lighted that the Federal Constitution contained no “provision of an at- tempt to endow the legislature of the State with power to enact laws in any manner other than that in which the constitution of the State has provided that laws shall be enacted.” Id., at 368. This Court recently reinforced the teachings of Hildebrant and Smi- ley in Arizona State Legislature v. Arizona Independent Redistricting Comm’n, 576 U. S. 787, a case concerning the constitutionality of an Arizona ballot initiative to amend the State Constitution and to vest redistricting authority in an independent commission. Significantly 4 MOORE v. HARPER

for present purposes, the Court embraced the core principle espoused in Hildebrant and Smiley: Whatever authority was responsible for re- districting, that entity remained subject to constraints set forth in the State Constitution. The Court dismissed the argument that the Elec- tions Clause divests state constitutions of the power to enforce checks against the exercise of legislative power. The basic principle of these cases—reflected in Smiley’s unanimous command that a state legislature may not “create congressional dis- tricts independently of” requirements imposed “by the state constitu- tion with respect to the enactment of laws,” 285 U. S., at 373—com- mands continued respect. Pp. 15–18. (b) The precedents of this Court have long rejected the view that legislative action under the Elections Clause is purely federal in char- acter, governed only by restraints found in the Federal Constitution. The argument to the contrary does not account for the Framers’ un- derstanding that when legislatures make laws, they are bound by the provisions of the very documents that give them life. Thus, when a state legislature carries out its federal constitutional power to pre- scribe rules regulating federal elections, it acts both as a lawmaking body created and bound by its state constitution, and as the entity as- signed particular authority by the Federal Constitution. Both consti- tutions restrain the state legislature’s exercise of power. This Court’s decision in McPherson v. Blacker, 146 U. S. 1, in which the Court analyzed the Constitution’s similarly worded Electors Clause, is inapposite. That decision did not address any conflict be- tween state constitutional provisions and state legislatures. Nor does Leser v. Garnett, 258 U. S. 130, which involved a contested vote by a state legislature to ratify a federal constitutional amendment, help pe- titioners. That case concerned the power of state legislatures to ratify amendments to the Federal Constitution. But fashioning regulations governing federal elections “unquestionably calls for the exercise of lawmaking authority.” Arizona State Legislature, 576 U. S., at 808, n. 17. And the exercise of such authority in the context of the Elections Clause is subject to the ordinary constraints on lawmaking in the state constitution. Pp. 18–22. (c) Petitioners concede that at least some state constitutional pro- visions can restrain a state legislature’s exercise of authority under the Elections Clause, but they read Smiley and Hildebrant to differen- tiate between procedural and substantive constraints. But neither case drew such a distinction, and petitioners do not in any event offer a defensible line between procedure and substance in this context. Pp. 22–24. (d) Historical practice confirms that state legislatures remain Cite as: 600 U. S. ____ (2023) 5

bound by state constitutional restraints when exercising authority un- der the Elections Clause. Two state constitutional provisions adopted shortly after the founding expressly constrained state legislative ac- tion under the Elections Clause. See Del. Const., Art. VIII, §2 (1792); Md. Const., Art. XIV (1810). In addition, multiple state constitutions at the time of the founding regulated the “manner” of federal elections by requiring that “elections shall be by ballot.” See, e.g., Ga. Const., Art. IV, §2. Moreover, the Articles of Confederation—from which the Framers borrowed—provided that “delegates shall be annually ap- pointed in such manner as the legislature of each state shall direct.” Art. V. Around the time the Articles were adopted, multiple States regulated the appointment of delegates, suggesting that the Framers did not understand that language to insulate state legislative action from state constitutional provisions. See, e.g., Del. Const., Art. XI (1776). Pp. 24–26. 3. Although the Elections Clause does not exempt state legislatures from the ordinary constraints imposed by state law, federal courts must not abandon their duty to exercise judicial review. This Court has an obligation to ensure that state court interpretations of state law do not evade federal law. For example, States “may not sidestep the Takings Clause by disavowing traditional property interests.” Phillips v. Washington Legal Foundation, 524 U. S. 156, 167. While the Court does not adopt a test by which state court interpretations of state law can be measured in cases implicating the Elections Clause, state courts may not transgress the ordinary bounds of judicial review such that they arrogate to themselves the power vested in state legislatures to regulate federal elections. The Court need not decide whether the North Carolina Supreme Court strayed beyond the limits derived from the Elections Clause, as petitioners did not meaningfully present the issue in this Court. Pp. 26–29. 380 N. C. 317, 868 S. E. 2d 499, affirmed.

ROBERTS, C. J., delivered the opinion of the Court, in which SO- TOMAYOR, KAGAN, KAVANAUGH, BARRETT, and JACKSON, JJ., joined. KAVANAUGH, J., filed a concurring opinion. THOMAS, J., filed a dissenting opinion in which GORSUCH, J., joined, and in which ALITO, J., joined as to Part I. Cite as: 600 U. S. ____ (2023) 1

Opinion of the Court

NOTICE: This opinion is subject to formal revision before publication in the United States Reports. Readers are requested to notify the Reporter of Decisions, Supreme Court of the United States, Washington, D. C. 20543, pio@supremecourt.gov, of any typographical or other formal errors.

SUPREME COURT OF THE UNITED STATES _________________

No. 21–1271 _________________

TIMOTHY K. MOORE, IN HIS OFFICIAL CAPACITY AS SPEAKER OF THE NORTH CAROLINA HOUSE OF REPRESENTATIVES, ET AL., PETITIONERS v. REBECCA HARPER, ET AL. ON WRIT OF CERTIORARI TO THE SUPREME COURT OF NORTH CAROLINA [June 27, 2023]

CHIEF JUSTICE ROBERTS delivered the opinion of the Court. Several groups of plaintiffs challenged North Carolina’s congressional districting map as an impermissible partisan gerrymander. The plaintiffs brought claims under North Carolina’s Constitution, which provides that “[a]ll elections shall be free.” Art. I, §10. Relying on that provision, as well as the State Constitution’s equal protection, free speech, and free assembly clauses, the North Carolina Supreme Court found in favor of the plaintiffs and struck down the legislature’s map. The Court concluded that North Caro- lina’s Legislature deliberately drew the State’s congres- sional map to favor Republican candidates. In drawing the State’s congressional map, North Caro- lina’s Legislature exercised authority under the Elections Clause of the Federal Constitution, which expressly re- quires “the Legislature” of each State to prescribe “[t]he Times, Places and Manner of ” federal elections. Art. I, §4, cl. 1. We decide today whether that Clause vests state leg- 2 MOORE v. HARPER

islatures with authority to set rules governing federal elec- tions free from restrictions imposed under state law. I The Elections Clause provides: “The Times, Places and Manner of holding Elections for Senators and Representa- tives, shall be prescribed in each State by the Legislature thereof; but the Congress may at any time by Law make or alter such Regulations, except as to the Places of chusing Senators.” Ibid. The Clause “imposes” on state legislatures the “duty” to prescribe rules governing federal elections. Arizona v. Inter Tribal Council of Ariz., Inc., 570 U. S. 1, 8 (2013). It also guards “against the possibility that a State would refuse to provide for the election of representatives” by authorizing Congress to prescribe its own rules. Ibid. A The 2020 decennial census showed that North Carolina’s population had increased by nearly one million people, en- titling the State to an additional seat in its federal congres- sional delegation. U. S. Census Bureau, 2020 Census Ap- portionment Results (2021) (Table A). Following those results, North Carolina’s General Assembly set out to re- draw the State’s congressional districts. North Carolina League of Conservation Voters, Inc. v. Representative Destin Hall, 21 CVS 015426 etc. (Super. Ct. Wake Cty., N. C., Dec. 3, 2021), App. to Pet. for Cert. 260a–261a, rev’d and re- manded on other grounds, Harper v. Hall, 380 N. C. 317, 868 S. E. 2d 499 (2022) (Harper I ). The General Assembly also drafted new maps for the State’s legislative districts, including the State House and the State Senate. Id., at 328–329, 868 S. E. 2d, at 513. In November 2021, the As- sembly enacted three new maps, each passed along party lines. Id., at 329, 868 S. E. 2d, at 513; see N. C. Gen. Stat. Ann. §120–1 (2021) (State Senate); §120–2 (State House); §163–201 (U. S. House of Representatives). Cite as: 600 U. S. ____ (2023) 3

Shortly after the new maps became law, several groups of plaintiffs—including the North Carolina League of Con- servation Voters, Common Cause, and individual voters— sued in state court. The plaintiffs asserted that each map constituted an impermissible partisan gerrymander in vio- lation of the North Carolina Constitution. Harper I, 380 N. C., at 329–330, 868 S. E. 2d, at 513–514.1 At trial before a three-judge panel of the Wake County Superior Court, the plaintiffs presented expert testimony and other evidence to support their claims that North Carolina’s General Assem- bly drew state legislative and federal congressional maps to favor Republican candidates. Id., at 332, 868 S. E. 2d, at 515. The trial court agreed, finding that the General As- sembly’s 2021 congressional districting map was “a parti- san outlier intentionally and carefully designed to maxim- ize Republican advantage in North Carolina’s Con- gressional delegation.” Id., at 345, 868 S. E. 2d, at 522 (in- ternal quotation marks omitted). But the court denied re- lief, reasoning that the partisan gerrymandering claims “amounted to political questions that are nonjusticiable un- der the North Carolina Constitution.” Id., at 348, 868 S. E. 2d, at 524. The North Carolina Supreme Court reversed, holding that the legislative defendants violated state law “beyond a reasonable doubt” by enacting maps that constituted parti- san gerrymanders. Id., at 353, 868 S. E. 2d, at 528. It also rejected the trial court’s conclusion that partisan gerryman- dering claims present a nonjusticiable political question. Ibid. The Court acknowledged our decision in Rucho v. Common Cause, which held “that partisan gerrymandering claims present political questions beyond the reach of the federal courts.” 588 U. S. ___, ___ (2019) (slip op., at 30); —————— 1 The plaintiffs also asserted that North Carolina’s Legislature dis-

criminated on the basis of race and raised other claims under the North Carolina Constitution. Harper I, 380 N. C., at 350–352, 868 S. E. 2d, at 526–527. Those claims are not at issue today. 4 MOORE v. HARPER

see Harper I, 380 N. C., at 360–361, 868 S. E. 2d, at 532– 533. But “simply because the Supreme Court has concluded partisan gerrymandering claims are nonjusticiable in fed- eral courts,” the court explained, “it does not follow that they are nonjusticiable in North Carolina courts.” Id., at 361, 868 S. E. 2d, at 533. The State Supreme Court also rejected the argument that the Elections Clause in the Fed- eral Constitution vests exclusive and independent author- ity in state legislatures to draw congressional maps. Id., at 390–391, 868 S. E. 2d, at 551–552. After holding that the 2021 districting maps “substan- tially infringe upon plaintiffs’ fundamental right to equal voting power,” the Court struck down the maps and re- manded the case to the trial “court to oversee the redrawing of the maps by the General Assembly or, if necessary, by the court.” Id., at 403, 868 S. E. 2d, at 559. The Court en- tered judgment on February 15, 2022. Harper v. Hall, No. 413PA21, App. to Pet. for Cert. 306–309. Two days later, the General Assembly adopted a remedial congres- sional redistricting plan. See 2022 N. C. Sess. Laws p. 3, §2. But the trial court rejected that plan and adopted in its place interim maps developed by several Special Masters for use in the 2022 North Carolina congressional elections. North Carolina League of Conservation Voters, Inc. v. Rep- resentative Destin Hall, 21 CVS 015426 etc. (Super. Ct. Wake Cty., N. C., Feb. 23, 2022), App. to Pet. for Cert. 278a–279a, aff ’d in part, rev’d in part, and remanded, Har- per v. Hall, 383 N. C. 89, 881 S. E. 2d 156 (2022) (Harper II ). On February 25, 2022, the legislative defendants filed an emergency application in this Court, citing the Elections Clause and requesting a stay of the North Carolina Su- preme Court’s decision. We declined to issue emergency re- lief but later granted certiorari. 597 U. S. ___ (2022). Cite as: 600 U. S. ____ (2023) 5

B Following our grant of certiorari, the North Carolina Su- preme Court heard an appeal concerning the trial court’s remedial order. In December 2022, the Court issued a de- cision affirming in part, reversing in part, and remanding the case. As relevant, it agreed with the trial court’s deter- mination that the General Assembly’s remedial congres- sional plan “fell short” of the requirements set forth in Har- per I. Harper II, 383 N. C., at 125, 881 S. E. 2d, at 181. The legislative defendants sought rehearing, requesting that the North Carolina Supreme Court “withdraw” its re- medial opinion in Harper II. Pet. for Rehearing in Harper v. Hall, No. 413PA21, p. 25 (Jan. 20, 2023) (Pet. for Rehear- ing). They also asked the Court to “overrule” its decision in Harper I, although they conceded that doing so would not “negate the force of its order striking down the 2021 plans.” Pet. for Rehearing 24. The North Carolina Supreme Court granted rehearing in Harper II, and we ordered the parties to submit supplemental briefing concerning our jurisdiction over this case in light of that decision. Following the parties’ submission of supplemental briefs in this Court, the North Carolina Supreme Court issued a decision granting the requests made by the legislative de- fendants. The Court withdrew its opinion in Harper II, con- cerning the remedial maps, and “overruled” its decision in Harper I. See Harper v. Hall, ___ N. C. ___, 886 S. E. 2d 393 (2023). Relying on our decision in Rucho and on a re- newed look at the constitutional provisions at issue, the Court repudiated Harper I ’s conclusion that partisan ger- rymandering claims are justiciable under the North Caro- lina Constitution. See ___ N. C., at ___, 886 S. E. 2d, at 431. The North Carolina Supreme Court dismissed the plain- tiffs’ claims with prejudice. Id., at ___, 886 S. E. 2d, at 401. But it did not reinstate the 2021 congressional plans that Harper I had struck down under the North Carolina Con- 6 MOORE v. HARPER

stitution. ___ N. C., at ___, 886 S. E. 2d, at 446–448. In- stead, the Court provided the General Assembly with the “opportunity to enact a new set of legislative and congres- sional redistricting plans, guided by federal law, the objec- tive constraints in Article II, Sections 3 and 5 [of the North Carolina Constitution], and this opinion.” Id., at ___, 886 S. E. 2d, at 448. The Court did not revisit Harper I ’s con- clusion that the Federal Elections Clause does not shield state legislatures from review by state courts for compli- ance with state constitutional provisions. ___ N. C., at ___, 886 S. E. 2d, at 422 (“The General Assembly exercises [re- districting] authority subject to the express limitations in our constitution and in federal law.”). We invited the par- ties to submit additional supplemental briefs addressing the effect of the Court’s decision on our jurisdiction. II Before turning to the merits, we must “determine as a threshold matter that we have jurisdiction.” Goodyear Atomic Corp. v. Miller, 486 U. S. 174, 178 (1988). The Con- stitution provides for our jurisdiction over “Cases” and “Controversies.” Art. III, §2. That constitutional require- ment ensures that the parties before us retain a “personal stake” in the litigation. Baker v. Carr, 369 U. S. 186, 204 (1962). As “[a] corollary to this case-or-controversy require- ment,” there must exist a dispute “at all stages of review, not merely at the time the complaint is filed.” Genesis HealthCare Corp. v. Symczyk, 569 U. S. 66, 71 (2013) (in- ternal quotation marks omitted). Mootness doctrine “ad- dresses whether an intervening circumstance has deprived the plaintiff of a personal stake in the outcome of the law- suit.” West Virginia v. EPA, 597 U. S. ___, ___ (2022) (slip op., at 15) (alterations and internal quotation marks omit- ted). The North Carolina Supreme Court’s decision to with- draw Harper II and overrule Harper I does not moot this Cite as: 600 U. S. ____ (2023) 7

case. The plaintiffs here sought to enjoin the use of the 2021 plans enacted by the legislative defendants. Harper I granted that relief, and in doing so rejected the Elections Clause defense at issue before us. 380 N. C., at 403, 868 S. E. 2d, at 559. Prior to both the appeal and rehearing proceedings in Harper II, the North Carolina Supreme Court had already entered the judgment and issued the mandate in Harper I. See App. to Pet. for Cert. 306–309. And the time during which the defendants could seek re- hearing as to that judgment had long since passed. See N. C. Rule App. Proc. 31(a) (2023) (requiring that a rehear- ing petition be brought within 15 days of the issuance of the mandate). Recognizing this reality, the legislative defend- ants did not ask the North Carolina Supreme Court to dis- turb the judgment in Harper I as part of the rehearing pro- ceedings. They instead acknowledged that they would remain bound by Harper I ’s decision enjoining the use of the 2021 plans. See Pet. for Rehearing 24 (“[O]verruling Harper I will not negate the force of its order striking down the 2021 plans.”). The North Carolina Supreme Court “overruled” Harper I, thereby granting the specific relief requested by the legis- lative defendants. As a result, partisan gerrymandering claims are no longer justiciable under the State’s Constitu- tion. Harper, ___ N. C., at ___, 886 S. E. 2d, at 449. But although the defendants may now draw new congressional maps, they agree that the North Carolina Supreme Court overruled only the “reasoning of Harper I ” and did not “dis- turb . . . its judgment nor . . . alter the presently operative statutes of North Carolina.” Second Supp. Letter Brief for Petitioners 3. In other words, although partisan gerryman- dering claims are no longer viable under the North Carolina Constitution, the North Carolina Supreme Court has done nothing to alter the effect of the judgment in Harper I en- joining the use of the 2021 maps. As a result, the legislative defendants’ path to complete relief runs through this Court. 8 MOORE v. HARPER

Were we to reverse the judgment in Harper I—a step not taken by the North Carolina Supreme Court—the 2021 plans enacted by the legislative defendants would again take effect. The parties accordingly continue to have a “per- sonal stake in the ultimate disposition of the lawsuit.” Chafin v. Chafin, 568 U. S. 165, 172 (2013) (internal quota- tion marks omitted). A North Carolina statute with specific application to this proceeding confirms that the controversy before us remains live. Under state law, if “the United States Supreme Court . . . reverses” the decision in Harper I, the 2021 maps will again become “effective.” 2022 N. C. Sess. Laws p. 10, §2. We have previously found such trigger provisions—in North Carolina, no less—sufficient to avoid mootness under Article III. See Hunt v. Cromartie, 526 U. S. 541, 546, n. 1 (1999) (“Because the State’s 1998 law provides that the State will revert to the 1997 districting plan upon a favora- ble decision of this Court . . . this case is not moot.”). We also have jurisdiction to review the judgment in Har- per I under 28 U. S. C. §1257(a). That statute provides for this Court’s exercise of jurisdiction over “[f]inal judgments or decrees rendered by the highest court of a State in which a decision could be had.” Ibid. We have, however, “recur- ringly encountered situations in which the highest court of a State has finally determined the federal issue present in a particular case, but in which there are further proceed- ings in the lower state courts to come.” Cox Broadcasting Corp. v. Cohn, 420 U. S. 469, 477 (1975). Cox Broadcasting delineated “at least four categories of such cases in which the Court has treated the decision on the federal issue as a final judgment for the purposes of 28 U. S. C. §1257,” despite “additional proceedings anticipated in the lower state courts.” Ibid. As relevant, the second category includes those “cases . . . in which the federal is- sue, finally decided by the highest court in the State, will survive and require decision regardless of the outcome of Cite as: 600 U. S. ____ (2023) 9

future state-court proceedings.” Id., at 480. Harper I fits within this second category of cases de- scribed in Cox Broadcasting. By striking down the 2021 congressional plans enacted by the General Assembly, Har- per I “finally decided” the “federal issue” whether the Elec- tions Clause insulates state legislatures from review by state courts for compliance with state law. See 380 N. C., at 390–391, 868 S. E. 2d, at 551–552. That issue both has survived and requires decision because subsequent pro- ceedings have neither altered Harper I ’s analysis of the fed- eral issue nor negated the effect of its judgment striking down the 2021 plans. In its decision “overruling” Harper I, the North Carolina Supreme Court in fact reaffirmed that it retains the authority to review congressional districting plans for compliance with state law. Harper, ___ N. C., at ___, 886 S. E. 2d, at 422. That the North Carolina Supreme Court overruled Har- per I does not affect the judgment in that case for purposes of §1257(a). “[T]he res judicata consequences of a final, un- appealed judgment on the merits” are not “altered by the fact that the judgment may have been wrong or rested on a legal principle subsequently overruled in another case.” Federated Department Stores, Inc. v. Moitie, 452 U. S. 394, 398 (1981). The North Carolina Supreme Court has said much the same. East Carolina Lumber Co. v. West, 247 N. C. 699, 701, 102 S. E. 2d, 248, 249 (1958) (“An erroneous or irregular judgment binds the parties thereto until cor- rected in a proper manner.”). That Court did not purport to alter or amend in any way the judgment in Harper I. In short, the record before us shows that Harper I “finally de- cided” the Elections Clause issue, which has survived sub- sequent proceedings in the North Carolina Supreme Court such that it continues to “require decision” by this Court. Cox Broadcasting, 420 U. S., at 480. JUSTICE THOMAS sees it differently. He correctly ob- 10 MOORE v. HARPER

serves that the North Carolina Supreme Court has now dis- missed the plaintiffs’ claims with prejudice. He posits, therefore, that the legislative defendants “are not injured by the judgment of Harper I.” Post, at 5 (dissenting opin- ion). But the record before us belies that notion. Harper I enjoined the use of the 2021 maps in subsequent elections in North Carolina. Well after the time for seeking rehear- ing as to that judgment passed, the legislative defendants instead sought rehearing with respect to Harper II, a dis- tinct decision concerning remedies. The defendants stead- fastly maintained in rehearing proceedings before the North Carolina Supreme Court that “overruling Harper I [would] not negate the force of its order striking down the 2021 plans.” Pet. for Rehearing 24; see also Legislative De- fendants’ Supp. Brief on Rehearing in Harper v. Hall, No. 413PA21–2, p. 56 (N. C., Feb. 17, 2023) (“[T]he Court’s dictate that the 2021 plans may not be used ‘in any future elections’ would not be vacated.”). With those concessions on the record, the North Carolina Supreme Court issued its decision “overruling” Harper I, and—by contrast—“with- draw[ing]” its decision in Harper II. Harper, ___ N. C., at ___, 886 S. E. 2d, at 449. And mirroring their representa- tions before the North Carolina Supreme Court, the legis- lative defendants now maintain in this Court that they con- tinue to remain bound by the judgment in Harper I. In an effort to cast doubt on these consistent representa- tions by the injured party before us, JUSTICE THOMAS con- tends that the legislative defendants have already received complete relief because nothing now prevents the imple- mentation of the 2021 maps. Post, at 15 (dissenting opin- ion). For the reasons stated above, that would come as a surprise to both the legislative defendants and the North Carolina Supreme Court. The dissent also emphasizes that several of the plaintiffs contest our jurisdiction. Post, at 6. But that has been their position from the very beginning, Cite as: 600 U. S. ____ (2023) 11

and it did not prevent our granting certiorari. The conces- sions offered by the legislative defendants as part of the re- hearing proceedings, the recent opinion issued by the North Carolina Supreme Court, and the legislative defendants’ briefing in this Court all tell the same story: Harper I con- tinues to enjoin the use of the 2021 maps. Following the dissent’s logic and dismissing this case as moot would fore- close the one path to full relief available to the legislative defendants: A decision by this Court reversing the judg- ment in Harper I. This Court has before it a judgment issued by a State’s highest court that adjudicates a federal constitutional is- sue. The defendants did not ask the North Carolina Su- preme Court to vacate that judgment, that court did not purport to do so, and the defendants now concede that they remain bound by it. Cox Broadcasting considered our exer- cise of jurisdiction where the “federal issue . . . will survive and require decision regardless of the outcome of future state-court proceedings.” 420 U. S., at 480. Unlike cases in which we must anticipate what the future might hold, we now know the resolution of the anticipated state court pro- ceedings. The record shows that Harper I finally decided the Elections Clause question, the judgment in that case continues to bind the parties before us, and the 2021 con- gressional maps would again take effect in North Carolina were we to reverse. Accordingly, we have jurisdiction under both Article III and §1257(a). III The question on the merits is whether the Elections Clause insulates state legislatures from review by state courts for compliance with state law. Since early in our Nation’s history, courts have recog- nized their duty to evaluate the constitutionality of legisla- tive acts. We announced our responsibility to review laws 12 MOORE v. HARPER

that are alleged to violate the Federal Constitution in Mar- bury v. Madison, proclaiming that “[i]t is emphatically the province and duty of the judicial department to say what the law is.” 1 Cranch 137, 177 (1803). Marbury confronted and rejected the argument that Congress may exceed con- stitutional limits on the exercise of its authority. “Certainly all those who have framed written constitutions,” we rea- soned, “contemplate them as forming the fundamental and paramount law of the nation, and consequently the theory of every such government must be, that an act of the legis- lature, repugnant to the constitution, is void.” Ibid. Marbury proclaimed our authority to invalidate laws that violate the Federal Constitution, but it did not fashion this concept out of whole cloth. Before the Constitutional Con- vention convened in the summer of 1787, a number of state courts had already moved “in isolated but important cases to impose restraints on what the legislatures were enacting as law.” G. Wood, The Creation of the American Republic 1776–1787, pp. 454–455 (1969). Although judicial review emerged cautiously, it matured throughout the founding era. These state court decisions provided a model for James Madison, Alexander Hamilton, and others who would later defend the principle of judicial review. In the 1786 case Trevett v. Weeden, for example, lawyer James Varnum challenged a Rhode Island statute on the ground that it failed to provide the right to a jury trial. Alt- hough Rhode Island lacked a written constitution, Varnum argued that the State nevertheless had a constitution re- flecting the basic historical rights of the English. And, he contended, the courts must honor “the principles of the con- stitution in preference to any acts of the General Assembly.” J. Varnum, The Case, Trevett v. Weeden, reprinted in 1 B. Schwartz, The Bill of Rights: A Documentary History 424 (1971). Varnum won, to the dismay of the State’s legisla- ture, which replaced four of the five judges involved. W. Treanor, Judicial Review Before Marbury, 58 Stan. L. Rev. Cite as: 600 U. S. ____ (2023) 13

455, 478 (2005). His arguments were published as a pam- phlet, which “may well have been the most prominent dis- cussion of judicial review at the time of the Philadelphia Constitutional Convention.” Id., at 477. The North Carolina Supreme Court played its own part in establishing judicial review. In Bayard v. Singleton, the court considered the constitutionality of a 1785 Act by the State’s General Assembly that prevented British loyalists from challenging property seizures before a jury. 1 Mort. 48 (1787). The court held the Act “abrogated and without any effect,” for “it was clear” that the legislature could not pass an Act that “could by any means repeal or alter the constitution.” Id., at 50. Otherwise, the legislature “would at the same instant of time, destroy their own existence as a Legislature, and dissolve the government thereby estab- lished.” Ibid. James Iredell, who would later serve as an inaugural Justice of this Court, penned at the time an open letter “To the Public” expounding a robust concept of judi- cial review. 2 Life and Correspondence of James Iredell 145 (1846). “[T]he power of the Assembly,” he wrote, “is limited and defined by the constitution.” Id., at 146. The legisla- ture, after all, “is a creature of the constitution.” Ibid. North Carolina and Rhode Island did not stand alone. See, e.g., Holmes v. Walton (N. J. 1780), described in A. Scott, Holmes vs. Walton: The New Jersey Precedent, 4 Am. Hist. Rev. 456 (1899); State v. Parkhurst, 9 N. J. L. 427, 444 (1802) (citing Holmes as holding that a statute providing for a six-person jury was “unconstitutional”). All told, “[s]tate courts in at least seven states invalidated state or local laws under their State constitutions before 1787,” which “laid the foundation for judicial review.” J. Sutton, 51 Imperfect Solutions 13 (2018). The Framers recognized state decisions exercising judi- cial review at the Constitutional Convention of 1787. On July 17, James Madison spoke in favor of a federal council of revision that could negate laws passed by the States. He 14 MOORE v. HARPER

lauded the Rhode Island judges “who refused to execute an unconstitutional law,” lamenting that the State’s legisla- ture then “displaced” them to substitute others “who would be willing instruments of the wicked & arbitrary plans of their masters.” 2 Records of the Federal Convention of 1787, p. 28 (M. Farrand ed. 1911). A week later, Madison extolled as one of the key virtues of a constitutional system that “[a] law violating a constitution established by the peo- ple themselves, would be considered by the Judges as null & void.” Id., at 93. Elbridge Gerry, a delegate from Massa- chusetts, also spoke in favor of judicial review. (Known for drawing a contorted legislative district that looked like a salamander, Gerry later became the namesake for the “ger- rymander.”) At the Convention, he noted that “[i]n some States the Judges had [actually] set aside laws as being agst. the Constitution.” 1 id., at 97 (alteration in original by James Madison). Such judicial review, he noted, was met “with general approbation.” Ibid. Writings in defense of the proposed Constitution echoed these comments. In the Federalist Papers, Alexander Ham- ilton maintained that “courts of justice” have the “duty . . . to declare all acts contrary to the manifest tenor of the Con- stitution void.” The Federalist No. 78, p. 466 (C. Rossiter ed. 1961). “[T]his doctrine” of judicial review, he also wrote, was “equally applicable to most if not all the State govern- ments.” Id., No. 81, at 482. State cases, debates at the Convention, and writings de- fending the Constitution all advanced the concept of judicial review. And in the years immediately following ratifica- tion, courts grew assured of their power to void laws incom- patible with constitutional provisions. See Treanor, 58 Stan. L. Rev., at 473, 497–498. The idea that courts may review legislative action was so “long and well established” by the time we decided Marbury in 1803 that Chief Justice Marshall referred to judicial review as “one of the funda- mental principles of our society.” 1 Cranch, at 176–177. Cite as: 600 U. S. ____ (2023) 15

IV We are asked to decide whether the Elections Clause carves out an exception to this basic principle. We hold that it does not. The Elections Clause does not insulate state legislatures from the ordinary exercise of state judicial re- view. A We first considered the interplay between state constitu- tional provisions and a state legislature’s exercise of au- thority under the Elections Clause in Ohio ex rel. Davis v. Hildebrant, 241 U. S. 565 (1916). There, we examined the application to the Elections Clause of a provision of the Ohio Constitution permitting the State’s voters “to approve or disapprove by popular vote any law enacted by the Gen- eral Assembly.” Id., at 566. In 1915, the Ohio General As- sembly drew new congressional districts, which the State’s voters then rejected through such a popular referendum. Asked to disregard the referendum, the Ohio Supreme Court refused, explaining that the Elections Clause—while “conferring the power therein defined upon the various state legislatures”—did not preclude subjecting legislative Acts under the Clause to “a popular vote.” State ex rel. Da- vis v. Hildebrant, 94 Ohio St. 154, 163, 114 N. E. 55, 58 (1916). We unanimously affirmed, rejecting as “plainly without substance” the contention that “to include the referendum within state legislative power for the purpose of apportion- ment is repugnant to §4 of Article I [the Elections Clause].” Hildebrant, 241 U. S., at 569; see also Hawke v. Smith, 253 U. S. 221, 230–231 (1920) (describing Hildebrant as holding that “the referendum provision of the state constitution when applied to a law redistricting the State with a view to representation in Congress was not unconstitutional”). Smiley v. Holm, decided 16 years after Hildebrant, con- sidered the effect of a Governor’s veto of a state redistricting 16 MOORE v. HARPER

plan. 285 U. S. 355, 361 (1932). Following the 15th decen- nial census in 1930, Minnesota lost one seat in its federal congressional delegation. The State’s legislature divided Minnesota’s then nine congressional districts in 1931 and sent its Act to the Governor for his approval. The Governor vetoed the plan pursuant to his authority under the State’s Constitution. But the Minnesota Secretary of State never- theless began to implement the legislature’s map for up- coming elections. A citizen sued, contending that the legis- lature’s map “was a nullity in that, after the Governor’s veto, it was not repassed by the legislature as required by law.” Id., at 362. The Minnesota Supreme Court disagreed. In its view, “the authority so given by” the Elections Clause “is unrestricted, unlimited, and absolute.” State ex rel. Smi- ley v. Holm, 184 Minn. 228, 242, 238 N. W. 494, 501 (1931). The Elections Clause, it held, conferred upon the legislature “the exclusive right to redistrict” such that its actions were “beyond the reach of the judiciary.” Id., at 243, 238 N. W., at 501. We unanimously reversed. A state legislature’s “exercise of . . . authority” under the Elections Clause, we held, “must be in accordance with the method which the State has pre- scribed for legislative enactments.” Smiley, 285 U. S., at 367. Nowhere in the Federal Constitution could we find “provision of an attempt to endow the legislature of the State with power to enact laws in any manner other than that in which the constitution of the State has provided that laws shall be enacted.” Id., at 368. Smiley relied on founding-era provisions, constitutional structure, and historical practice, each of which we found persuasive. Two States at the time of the founding provided a veto power, restrictions that were “well known.” Ibid. (cit- ing provisions in Massachusetts and New York). Subjecting state legislatures to such a limitation “was no more incon- gruous with the grant of legislative authority to regulate congressional elections than the fact that the Congress in Cite as: 600 U. S. ____ (2023) 17

making its regulations under the same provision would be subject to the veto power of the President.” Ibid.; see also Wesberry v. Sanders, 376 U. S. 1, 6 (1964) (Congress does not have “exclusive authority” under the Elections Clause, independent of other federal constitutional provisions). And “long and continuous interpretation” as evidenced by “the established practice in the states” provided further support. Smiley, 285 U. S., at 369. We noted that many state constitutions had adopted provisions allowing for ex- ecutive vetoes, “and that the uniform practice . . . has been to provide for congressional districts by the enactment of statutes with the participation of the Governor wherever the state constitution provided for such participation.” Id., at 370. This Court recently reinforced the teachings of Hilde- brant and Smiley in a case considering the constitutionality of an Arizona ballot initiative. Voters “amended Arizona’s Constitution to remove redistricting authority from the Ar- izona Legislature and vest that authority in an independent commission.” Arizona State Legislature v. Arizona Inde- pendent Redistricting Comm’n, 576 U. S. 787, 792 (2015). The Arizona Legislature challenged a congressional map adopted by the commission, arguing that the Elections “Clause precludes resort to an independent commission . . . to accomplish redistricting.” Ibid. A divided Court rejected that argument. The majority reasoned that dictionaries of “the founding era . . . capaciously define[d] the word ‘legis- lature,’ ” id., at 813–814, and concluded that the people of Arizona retained the authority to create “an alternative leg- islative process” by vesting the lawmaking power of redis- tricting in an independent commission, id., at 817. The Court ruled, in short, that although the Elections Clause expressly refers to the “Legislature,” it does not preclude a State from vesting congressional redistricting authority in a body other than the elected group of officials who ordinar- ily exercise lawmaking power. States, the Court explained, 18 MOORE v. HARPER

“retain autonomy to establish their own governmental pro- cesses.” Id., at 816. The significant point for present purposes is that the Court in Arizona State Legislature recognized that what- ever authority was responsible for redistricting, that entity remained subject to constraints set forth in the State Con- stitution. The Court embraced the core principle espoused in Hildebrant and Smiley “that redistricting is a legislative function, to be performed in accordance with the State’s prescriptions for lawmaking, which may include the refer- endum and the Governor’s veto.” 576 U. S., at 808; see also id., at 840–841 (ROBERTS, C. J., dissenting) (recognizing that Hildebrant and Smiley support the imposition of “some constraints on the legislature”). The Court dismissed the argument that the Elections Clause divests state constitu- tions of the power to enforce checks against the exercise of legislative power: “Nothing in [the Elections] Clause in- structs, nor has this Court ever held, that a state legislature may prescribe regulations on the time, place, and manner of holding federal elections in defiance of provisions of the State’s constitution.” 576 U. S., at 817–818 (majority opin- ion). The reasoning we unanimously embraced in Smiley com- mands our continued respect: A state legislature may not “create congressional districts independently of ” require- ments imposed “by the state constitution with respect to the enactment of laws.” 285 U. S., at 373. B The legislative defendants and the dissent both contend that, because the Federal Constitution gives state legisla- tures the power to regulate congressional elections, only that Constitution can restrain the exercise of that power. Brief for Petitioners 22; post, at 17 (opinion of THOMAS, J.). The legislative defendants cite for support Federalist No. 78, which explains that the wielding of legislative Cite as: 600 U. S. ____ (2023) 19

power is constrained by “the tenor of the commission under which it is exercised.” The Federalist No. 78, at 466; see Tr. of Oral Arg. 4. This argument simply ignores the precedent just de- scribed. Hildebrant, Smiley, and Arizona State Legislature each rejected the contention that the Elections Clause vests state legislatures with exclusive and independent authority when setting the rules governing federal elections. The argument advanced by the defendants and the dis- sent also does not account for the Framers’ understanding that when legislatures make laws, they are bound by the provisions of the very documents that give them life. Leg- islatures, the Framers recognized, “are the mere creatures of the State Constitutions, and cannot be greater than their creators.” 2 Farrand 88. “What are Legislatures? Crea- tures of the Constitution; they owe their existence to the Constitution: they derive their powers from the Constitu- tion: It is their commission; and, therefore, all their acts must be conformable to it, or else they will be void.” Vanhorne’s Lessee v. Dorrance, 2 Dall. 304, 308 (Pa. 1795). Marbury confirmed this understanding, 1 Cranch, at 176– 177, and nothing in the text of the Elections Clause under- mines it. When a state legislature carries out its constitu- tional power to prescribe rules regulating federal elections, the “commission under which” it exercises authority is two- fold. The Federalist No. 78, at 467. The legislature acts both as a lawmaking body created and bound by its state constitution, and as the entity assigned particular author- ity by the Federal Constitution. Both constitutions restrain the legislature’s exercise of power. Turning to our precedents, the defendants quote from our analysis of the Electors Clause in McPherson v. Blacker, 146 U. S. 1 (1892). That Clause—similar to the Elections Clause—provides that “Each State shall appoint, in such Manner as the Legislature thereof may direct, a [specified] 20 MOORE v. HARPER

Number of Electors.” Art. II, §1, cl. 2. McPherson consid- ered a challenge to the Michigan Legislature’s decision to allocate the State’s electoral votes among the individual congressional districts, rather than to the State as a whole. We upheld that decision, explaining that in choosing Presi- dential electors, the Clause “leaves it to the legislature ex- clusively to define the method of effecting the object.” 146 U. S., at 27. Our decision in McPherson, however, had nothing to do with any conflict between provisions of the Michigan Con- stitution and action by the State’s legislature—the issue we confront today. McPherson instead considered whether Michigan’s Legislature itself directly violated the Electors Clause (by taking from the “State” the power to appoint and vesting that power in separate districts), the Fourteenth Amendment (by allowing voters to vote for only one Elector rather than “Electors”), and a particular federal statute. Id., at 8–9 (argument for plaintiffs in error). Nor does the quote highlighted by petitioners tell the whole story. Chief Justice Fuller’s opinion for the Court explained that “[t]he legislative power is the supreme authority except as limited by the constitution of the State.” Id., at 25 (emphasis added); see also ibid. (“What is forbidden or required to be done by a State is forbidden or required of the legislative power un- der state constitutions as they exist.”). The legislative defendants and JUSTICE THOMAS rely as well on our decision in Leser v. Garnett, 258 U. S. 130 (1922), but it too offers little support. See post, at 17, 20– 21. Leser addressed an argument that the Nineteenth Amendment—providing women the right to vote—was in- valid because state constitutional provisions “render[ed] in- operative the alleged ratifications by their legislatures.” 258 U. S., at 137. We rejected that position, holding that when state legislatures ratify amendments to the Constitu- tion, they carry out “a federal function derived from the Federal Constitution,” which “transcends any limitations Cite as: 600 U. S. ____ (2023) 21

sought to be imposed by the people of a State.” Ibid. But the legislature in Leser performed a ratifying func- tion rather than engaging in traditional lawmaking. The provisions at issue in today’s case—like the provisions ex- amined in Hildebrant and Smiley—concern a state legisla- ture’s exercise of lawmaking power. And as we held in Smi- ley, when state legislatures act pursuant to their Elections Clause authority, they engage in lawmaking subject to the typical constraints on the exercise of such power. 285 U. S., at 367. We have already distinguished Leser on those grounds. Smiley, 285 U. S., at 365–366. In addition, Leser cited for support our decision in Hawke v. Smith, which sharply separated ratification “from legislative action” un- der the Elections Clause. 253 U. S., at 228. Lawmaking under the Elections Clause, Hawke explained, “is entirely different from the requirement of the Constitution as to the expression of assent or dissent to a proposed amendment to the Constitution.” Id., at 231. Hawke and Smiley delineated the various roles that the Constitution assigns to state legislatures. Legislatures act as “Consent[ing]” bodies when the Nation purchases land, Art. I, §8, cl. 17; as “Ratif[ying]” bodies when they agree to proposed Constitutional amendments, Art. V; and—prior to the passage of the Seventeenth Amendment—as “electoral” bodies when they choose United States Senators, Smiley, 285 U. S., at 365; see also Art. I, §3, cl. 1; Amdt. 17 (provid- ing for the direct election of Senators). By fulfilling their constitutional duty to craft the rules governing federal elections, state legislatures do not con- sent, ratify, or elect—they make laws. Elections are com- plex affairs, demanding rules that dictate everything from the date on which voters will go to the polls to the dimen- sions and font of individual ballots. Legislatures must “pro- vide a complete code for congressional elections,” including regulations “relati[ng] to notices, registration, supervision 22 MOORE v. HARPER

of voting, protection of voters, prevention of fraud and cor- rupt practices, counting of votes, duties of inspectors and canvassers, and making and publication of election re- turns.” Smiley, 285 U. S., at 366. In contrast, a simple up- or-down vote suffices to ratify an amendment to the Consti- tution. Providing consent to the purchase of land or elect- ing Senators involves similarly straightforward exercises of authority. But fashioning regulations governing federal elections “unquestionably calls for the exercise of lawmak- ing authority.” Arizona State Legislature, 576 U. S., at 808, n. 17. And the exercise of such authority in the context of the Elections Clause is subject to the ordinary constraints on lawmaking in the state constitution. In sum, our precedents have long rejected the view that legislative action under the Elections Clause is purely fed- eral in character, governed only by restraints found in the Federal Constitution. C Addressing our decisions in Smiley and Hildebrant, both the legislative defendants and JUSTICE THOMAS concede that at least some state constitutional provisions can re- strain a state legislature’s exercise of authority under the Elections Clause. But they read those cases to differentiate between procedural and substantive constraints. Brief for Petitioners 24; post, at 21–22 (opinion of THOMAS, J.). Smi- ley, in their view, stands for the proposition that state con- stitutions may impose only procedural hoops through which legislatures must jump in crafting rules governing federal elections. This concededly “formalistic” approach views the Governor’s veto at issue in Smiley as one such procedural restraint. Tr. of Oral Arg. 62. But when it comes to sub- stantive provisions, their argument goes, our precedents have nothing to say. This argument adopts too cramped a view of our decision in Smiley. Chief Justice Hughes’s opinion for the Court Cite as: 600 U. S. ____ (2023) 23

drew no distinction between “procedural” and “substantive” restraints on lawmaking. It turned on the view that state constitutional provisions apply to a legislature’s exercise of lawmaking authority under the Elections Clause, with no concern about how those provisions might be categorized. 285 U. S., at 367–368; see also Hildebrant, 241 U. S., at 569–570. The same goes for the Court’s decision in Arizona State Legislature. The defendants attempt to cabin that case by arguing that the Court did not address substantive limits on the regulation of federal elections. But as in Smiley, the Court’s decision in Arizona State Legislature discussed no difference between procedure and substance. The dissent reads Smiley and Arizona State Legislature in a different light. JUSTICE THOMAS thinks those cases say nothing about whether a State can impose “substantive lim- its” on the legislature’s exercise of power under the Elec- tions Clause. Post, at 21. But in Smiley, we addressed whether “the conditions which attach to the making of state laws” apply to legislatures exercising authority under the Elections Clause. 285 U. S., at 365. We held that they do. “Much that is urged in argument with regard to the mean- ing of the term ‘Legislature,’ ” we explained, “is beside the point.” Ibid. And we concluded in straightforward terms that legislatures must abide by “restriction[s] imposed by state constitutions . . . when exercising the lawmaking power” under the Elections Clause. Id., at 369. Arizona State Legislature said much the same, emphasizing that, by its text, nothing in the Elections Clause offers state legisla- tures carte blanche to act “in defiance of provisions of the State’s constitution.” 576 U. S., at 818. The defendants and JUSTICE THOMAS do not in any event offer a defensible line between procedure and substance in this context. “The line between procedural and substantive law is hazy.” Erie R. Co. v. Tompkins, 304 U. S. 64, 92 (1938) (Reed, J., concurring in part); see also Shady Grove 24 MOORE v. HARPER

Orthopedic Associates, P. A. v. Allstate Ins. Co., 559 U. S. 393, 419–420 (2010) (Stevens, J., concurring in part and concurring in judgment). Many rules “are rationally capa- ble of classification as either.” Hanna v. Plumer, 380 U. S. 460, 472 (1965); see also Sun Oil Co. v. Wortman, 486 U. S. 717, 726 (1988) (“Except at the extremes, the terms ‘sub- stance’ and ‘procedure’ precisely describe very little except a dichotomy.”). Procedure, after all, is often used as a vehi- cle to achieve substantive ends. When a governor vetoes a bill because of a disagreement with its policy consequences, has the governor exercised a procedural or substantive re- straint on lawmaking? Smiley did not endorse such murky inquiries into the nature of constitutional restraints, and we see no neat distinction today. D Were there any doubt, historical practice confirms that state legislatures remain bound by state constitutional re- straints when exercising authority under the Elections Clause. We have long looked to “settled and established practice” to interpret the Constitution. The Pocket Veto Case, 279 U. S. 655, 689 (1929). And we have found histor- ical practice particularly pertinent when it comes to the Elections and Electors Clauses. Smiley, 285 U. S., at 369 (Elections Clause); Chiafalo v. Washington, 591 U. S. ___, ___–___ (2020) (slip op., at 12–14) (Electors Clause). Two state constitutional provisions adopted shortly after the founding offer the strongest evidence. Delaware’s 1792 Constitution provided that the State’s congressional repre- sentatives “shall be voted for at the same places where rep- resentatives in the State legislature are voted for, and in the same manner.” Art. VIII, §2. Even though the Elec- tions Clause stated that the “Places” and “Manner” of fed- eral elections shall be “prescribed” by the state legislatures, the Delaware Constitution expressly enacted rules govern- Cite as: 600 U. S. ____ (2023) 25

ing the “places” and “manner” of holding elections for fed- eral office. An 1810 amendment to the Maryland Constitu- tion likewise embodied regulations falling within the scope of the Elections and Electors Clauses. Article XIV provided that every qualified citizen “shall vote, by ballot, . . . for electors of the President and Vice-President of the United States, [and] for Representatives of this State in the Con- gress of the United States.” If the Elections Clause had vested exclusive authority in state legislatures, unchecked by state courts enforcing provisions of state constitutions, these clauses would have been unenforceable from the start. Besides the two specific provisions in Maryland and Del- aware, multiple state constitutions at the time of the found- ing regulated federal elections by requiring that “[a]ll elec- tions shall be by ballot.” Ga. Const., Art. IV, §2 (1789); see also, e.g., Pa. Const., Art. III, §2 (1790); Ky. Const., Art. III, cl. 2 (1792); Tenn. Const., Art. III, §3 (1796); Ohio Const., Art. IV, §2 (1803); La. Const., Art. VI, §13 (1812). These provisions directed the “manner” of federal elections within the meaning of the Elections Clause, as Madison himself explained at the Constitutional Convention. See 2 Farrand 240 (“Whether the electors should vote by ballot or vivâ voce” falls within the “great latitude” of “regulating the times places & manner of holding elections”). The legislative defendants discount this evidence. They argue that those “by ballot” provisions spoke only “to the offices that were created by” state constitutions, and not to the federal offices to which the Elections Clause applies. Tr. of Oral Arg. 18. We find no textual hook for that strained reading. “All” meant then what it means now. In addition, the Framers did not write the Elections Clause on a blank slate—they instead borrowed from the Articles of Confederation, which provided that “delegates shall be annually appointed in such manner as the legisla- ture of each state shall direct.” Art. V. The two provisions 26 MOORE v. HARPER

closely parallel. And around the time the Articles were adopted by the Second Continental Congress, multiple States regulated the “manner” of “appoint[ing] delegates,” ibid., suggesting that the Framers did not understand that language to insulate state legislative action from state con- stitutional provisions. See Del. Const., Art. XI (1776); Md. Const., Art. XXVII (1776); Va. Const., cls. 3–4 (1776); Pa. Const., §11 (1776); N. C. Const., Art. XXXVII (1776); Ga. Const., Art. XVI (1777); N. Y. Const., Art. XXX (1777); S. C. Const., Art. XXII (1778); Mass. Const., pt. 2, ch. IV (1780); N. H. Const., pt. II (1784). The defendants stress an 1820 convention held in Massa- chusetts to amend the Commonwealth’s Constitution. Af- ter a Boston delegate proposed a provision regulating the manner of federal elections, Joseph Story—then a Justice of this Court—nixed the effort. In Story’s view, such a pro- vision would run afoul of the Elections Clause by “as- sum[ing] a control over the Legislature, which the constitu- tion of the United States does not justify.” Journal of the Debates and Proceedings in the Convention of Delegates 110 (1853). But Story’s comment elicited little discussion, and reflects the views of a jurist who, although “a brilliant and accomplished man, . . . was not a member of the Found- ing generation.” U. S. Term Limits, Inc. v. Thornton, 514 U. S. 779, 856 (1995) (THOMAS, J., dissenting). V A Although we conclude that the Elections Clause does not exempt state legislatures from the ordinary constraints im- posed by state law, state courts do not have free rein. “State courts are the appropriate tribunals . . . for the decision of questions arising under their local law, whether statutory or otherwise.” Murdock v. Memphis, 20 Wall. 590, 626 (1875). At the same time, the Elections Clause expressly vests power to carry out its provisions in “the Legislature” Cite as: 600 U. S. ____ (2023) 27

of each State, a deliberate choice that this Court must re- spect. As in other areas where the exercise of federal au- thority or the vindication of federal rights implicates ques- tions of state law, we have an obligation to ensure that state court interpretations of that law do not evade federal law. State law, for example, “is one important source” for de- fining property rights. Tyler v. Hennepin County, 598 U. S. ___, ___ (2023) (slip op., at 5); see also Board of Regents of State Colleges v. Roth, 408 U. S. 564, 577 (1972) (property rights “are created and their dimensions are defined by ex- isting rules or understandings that stem from an independ- ent source such as state law”). At the same time, the Fed- eral Constitution provides that “private property” shall not “be taken for public use, without just compensation.” Amdt. 5. As a result, States “may not sidestep the Takings Clause by disavowing traditional property interests.” Phillips v. Washington Legal Foundation, 524 U. S. 156, 164 (1998); see also Webb’s Fabulous Pharmacies, Inc. v. Beckwith, 449 U. S. 155, 164 (1980) (holding that States may not, “by ipse dixit, . . . transform private property into public property without compensation”). A similar principle applies with respect to the Contracts Clause, which provides that “[n]o state shall . . . pass any . . . Law impairing the Obligation of Contracts.” Art. I, §10, cl. 1. In that context “we accord respectful consideration and great weight to the views of the State’s highest court.” Indiana ex rel. Anderson v. Brand, 303 U. S. 95, 100 (1938). Still, “in order that the constitutional mandate may not be- come a dead letter, we are bound to decide for ourselves whether a contract was made.” Ibid.; see also General Mo- tors Corp. v. Romein, 503 U. S. 181, 187 (1992). Cases raising the question whether adequate and inde- pendent grounds exist to support a state court judgment in- volve a similar inquiry. We have in those cases considered whether a state court opinion below adopted novel reason- ing to stifle the “vindication in state courts of . . . federal 28 MOORE v. HARPER

constitutional rights.” NAACP v. Alabama ex rel. Patter- son, 357 U. S. 449, 457–458 (1958). Running through each of these examples is the concern that state courts might read state law in such a manner as to circumvent federal constitutional provisions. Therefore, although mindful of the general rule of accepting state court interpretations of state law, we have tempered such defer- ence when required by our duty to safeguard limits imposed by the Federal Constitution. Members of this Court last discussed the outer bounds of state court review in the present context in Bush v. Gore, 531 U. S. 98 (2000) (per curiam). Our decision in that case turned on an application of the Equal Protection Clause of the Fourteenth Amendment. Id., at 104–105. In separate writings, several Justices addressed whether Florida’s Su- preme Court, in construing provisions of Florida statutory law, exceeded the bounds of ordinary judicial review to an extent that its interpretation violated the Electors Clause. Chief Justice Rehnquist, joined in a concurring opinion by JUSTICE THOMAS and Justice Scalia, acknowledged the usual deference we afford state court interpretations of state law, but noted “areas in which the Constitution re- quires this Court to undertake an independent, if still def- erential, analysis of state law.” Id., at 114. He declined to give effect to interpretations of Florida election laws by the Florida Supreme Court that “impermissibly distorted them beyond what a fair reading required.” Id., at 115. Justice Souter, for his part, considered whether a state court inter- pretation “transcends the limits of reasonable statutory in- terpretation to the point of supplanting the statute enacted by the ‘legislature’ within the meaning of Article II.” Id., at 133 (Souter, J., joined by Stevens, Ginsburg, and Breyer, JJ., dissenting). We do not adopt these or any other test by which we can measure state court interpretations of state law in cases im- plicating the Elections Clause. The questions presented in Cite as: 600 U. S. ____ (2023) 29

this area are complex and context specific. We hold only that state courts may not transgress the ordinary bounds of judicial review such that they arrogate to themselves the power vested in state legislatures to regulate federal elec- tions. B We decline to address whether the North Carolina Su- preme Court strayed beyond the limits derived from the Elections Clause. The legislative defendants did not mean- ingfully present the issue in their petition for certiorari or in their briefing, nor did they press the matter at oral argu- ment. See Bay Area Laundry and Dry Cleaning Pension Trust Fund v. Ferbar Corp. of Cal., 522 U. S. 192, 206–208 (1997); see also California v. Texas, 593 U. S. ___, ___ (2021) (slip op., at 10). Counsel for the defendants expressly dis- claimed the argument that this Court should reassess the North Carolina Supreme Court’s reading of state law. Tr. of Oral Arg. 7 (“We’re not asking this Court to second-guess or reassess. We say take the North Carolina Supreme Court’s decision on face value and as fairly reflecting North Carolina law . . . .”). When pressed whether North Caro- lina’s Supreme Court did not fairly interpret its State Con- stitution, counsel reiterated that such an argument was “not our position in this Court.” Id., at 54. Although coun- sel attempted to expand the scope of the argument in rebut- tal, such belated efforts do not overcome prior failures to preserve the issue for review. See this Court’s Rule 28 (“[C]ounsel making the opening argument shall present the case fairly and completely and not reserve points of sub- stance for rebuttal.”). * * * State courts retain the authority to apply state constitu- tional restraints when legislatures act under the power con- ferred upon them by the Elections Clause. But federal 30 MOORE v. HARPER

courts must not abandon their own duty to exercise judicial review. In interpreting state law in this area, state courts may not so exceed the bounds of ordinary judicial review as to unconstitutionally intrude upon the role specifically re- served to state legislatures by Article I, Section 4, of the Federal Constitution. Because we need not decide whether that occurred in today’s case, the judgment of the North Carolina Supreme Court is affirmed.2

It is so ordered.

—————— 2 As noted, supra, at 5–6, the North Carolina Supreme Court withdrew

the opinion in Harper II, which addressed both the remedial maps devel- oped by the General Assembly and an order by the trial court implement- ing an interim plan for the 2022 elections. The remedial order, having been withdrawn, is not before us, and our decision today does not pass on the constitutionality of any particular map adopted by the state courts. Cite as: 600 U. S. ____ (2023) 1

KAVANAUGH, J., concurring

TIMOTHY K. MOORE, IN HIS OFFICIAL CAPACITY AS SPEAKER OF THE NORTH CAROLINA HOUSE OF REPRESENTATIVES, ET AL., PETITIONERS v. REBECCA HARPER, ET AL. ON WRIT OF CERTIORARI TO THE SUPREME COURT OF NORTH CAROLINA [June 27, 2023]

JUSTICE KAVANAUGH, concurring. I join the Court’s opinion in full. The Court today correctly concludes that state laws governing federal elections are subject to ordinary state court review, including for compliance with the relevant state constitution. Ante, at 15, 26, 29. But because the Elections Clause assigns authority respecting federal elections to state legislatures, the Court also correctly concludes that “state courts do not have free rein” in conducting that review. Ante, at 26. Therefore, a state court’s interpretation of state law in a case implicating the Elections Clause is subject to federal court review. Ante, at 26–30; see also Bush v. Palm Beach County Canvassing Bd., 531 U. S. 70, 76–78 (2000) (unanimously concluding that a state court’s interpretation of state law in a federal election case presents a federal issue); cf. Democratic National Committee v. Wisconsin State Legislature, 592 U. S. ___, ___, n. 1 (2020) (KAVANAUGH, J., concurring in denial of application to vacate stay) (slip op., at 9, n. 1). Federal court review of a state court’s interpretation of state law in a federal election case “does not imply a disrespect for state courts but rather a respect for the constitutionally prescribed role of state legislatures.” Bush 2 MOORE v. HARPER

v. Gore, 531 U. S. 98, 115 (2000) (Rehnquist, C. J., concurring). The question, then, is what standard a federal court should employ to review a state court’s interpretation of state law in a case implicating the Elections Clause— whether Chief Justice Rehnquist’s standard from Bush v. Gore; Justice Souter’s standard from Bush v. Gore; the Solicitor General’s proposal in this case; or some other standard. Chief Justice Rehnquist’s standard is straightforward: whether the state court “impermissibly distorted” state law “beyond what a fair reading required.” Ibid. As I understand it, Justice Souter’s standard, at least the critical language, is similar: whether the state court exceeded “the limits of reasonable” interpretation of state law. Id., at 133 (dissenting opinion). And the Solicitor General here has proposed another similar approach: whether the state court reached a “truly aberrant” interpretation of state law. Brief for United States as Amicus Curiae 27. As I see it, all three standards convey essentially the same point: Federal court review of a state court’s interpretation of state law in a federal election case should be deferential, but deference is not abdication.1 I would adopt Chief Justice Rehnquist’s straightforward standard. As able counsel for North Carolina stated at oral argument, the Rehnquist standard “best sums it up.” Tr. of Oral Arg. 131. Chief Justice Rehnquist’s standard should apply not —————— 1 I doubt that there would be a material difference in application

among the standards formulated by Chief Justice Rehnquist, Justice Souter, and the Solicitor General, given the similarities in the three standards, at least as described above. To be sure, different judges may reach different conclusions in an individual case about whether a particular state court interpretation is impermissible under the chosen standard. But I doubt that the precise formulation of the standard— assuming it is Chief Justice Rehnquist’s, Justice Souter’s, or the Solicitor General’s—would be the decisive factor in any such disagreement. Cite as: 600 U. S. ____ (2023) 3

only to state court interpretations of state statutes, but also to state court interpretations of state constitutions. And in reviewing state court interpretations of state law, “we necessarily must examine the law of the State as it existed prior to the action of the [state] court.” Bush, 531 U. S., at 114 (Rehnquist, C. J., concurring). Petitioners here, however, have disclaimed any argument that the North Carolina Supreme Court misinterpreted the North Carolina Constitution or other state law. See ante, at 29.2 For now, therefore, this Court need not, and ultimately does not, adopt any specific standard for our review of a state court’s interpretation of state law in a case implicating the Elections Clause. See ante, at 28 (“We do not adopt these or any other test by which we can measure state court interpretations of state law in cases implicating the Elections Clause”). Instead, the Court today says simply that “state courts do not have free rein” and “hold[s] only that state courts may not transgress the ordinary bounds of judicial review.” Ante, at 26, 29. In other words, the Court has recognized and articulated a general principle for federal court review of state court decisions in federal election cases. In the future, the Court should and presumably will distill that general principle into a more specific standard such as the one advanced by Chief Justice Rehnquist. With those additional comments, I agree with the Court’s conclusions that (i) state laws governing federal elections are subject to ordinary state court review, and (ii) a state court’s interpretation of state law in a case implicating the Elections Clause is in turn subject to federal court review.

—————— 2 Instead, petitioners make the broader argument, which the Court

today properly rejects, that the Elections Clause bars state courts from reviewing state laws for compliance with the relevant state constitution. Cite as: 600 U. S. ____ (2023) 1

THOMAS, J., dissenting

TIMOTHY K. MOORE, IN HIS OFFICIAL CAPACITY AS SPEAKER OF THE NORTH CAROLINA HOUSE OF REPRESENTATIVES, ET AL., PETITIONERS v. REBECCA HARPER, ET AL. ON WRIT OF CERTIORARI TO THE SUPREME COURT OF NORTH CAROLINA [June 27, 2023]

JUSTICE THOMAS, with whom JUSTICE GORSUCH joins, and with whom JUSTICE ALITO joins as to Part I, dissenting. This Court sits “to resolve not questions and issues but ‘Cases’ or ‘Controversies.’ ” Arizona Christian School Tui- tion Organization v. Winn, 563 U. S. 125, 132 (2011); see U. S. Const., Art. III, §1. As a corollary of that basic consti- tutional principle, the Court “is without power to decide moot questions or to give advisory opinions which cannot affect the rights of the litigants in the case before it.” St. Pierre v. United States, 319 U. S. 41, 42 (1943) (per curiam). To do so would be to violate “the oldest and most consistent thread in the federal law of justiciability.” Flast v. Cohen, 392 U. S. 83, 96 (1968) (internal quotation marks omitted). The opinion that the Court releases today breaks that thread. It “affirms” an interlocutory state-court judgment that has since been overruled and supplanted by a final judgment resolving all claims in petitioners’ favor. The is- sue on which it opines—a federal defense to claims already dismissed on other grounds—can no longer affect the judg- ment in this litigation in any way. As such, the question is indisputably moot, and today’s majority opinion is plainly advisory. Because the writ of certiorari should be dis- missed, I respectfully dissent. 2 MOORE v. HARPER

I Here is the case before us in a nutshell: A group of plain- tiffs sued various state officials under state law. The de- fendants raised both state-law and federal-law defenses. In the interlocutory judgment below, the State Supreme Court rejected both defenses and remanded for further proceed- ings. We granted review to consider the defendants’ federal defense. But then, in subsequent proceedings, the state court revisited defendants’ alternative state-law defense and held that it was meritorious. As a result, the court fi- nally adjudicated the whole case in the defendants’ favor, dismissing the plaintiffs’ claims with prejudice. This is a straightforward case of mootness. The federal defense no longer makes any difference to this case— whether we agree with the defense, disagree with it, or say nothing at all, the final judgment in this litigation will be exactly the same. The majority does not seriously contest that fact. Even so, it asserts jurisdiction to decide this free- floating defense that affects no live claim for relief, reason- ing that a justiciable case or controversy exists as long as its opinion can in any way “alter the presently operative statutes of ” a State. Ante, at 7 (internal quotation marks omitted). By its own lights, the majority “is acting not as an Article III court,” Uzuegbunam v. Preczewski, 592 U. S. ___, ___ (2021) (ROBERTS, C. J., dissenting) (slip op., at 3), but as an ad hoc branch of a state legislature. That is em- phatically not our job. Compare U. S. Const., Art. III, §1, with N. C. Const., Art. II, §1. A To review the history of this case is to demonstrate that the question presented is moot. In 2021, the North Carolina General Assembly passed an Act to redistrict the State for elections to the U. S. House of Representatives. Plaintiffs- respondents filed an action in state court, seeking to enjoin state elections officials (defendants-respondents here) from Cite as: 600 U. S. ____ (2023) 3

conducting elections in accord with the Act.1 They based their claim for relief on the North Carolina Constitution, which they argued prohibits excessive partisan gerryman- ders. Petitioners, state legislators representing North Caro- lina’s interest in the enforcement of the Act, see N. C. Gen. Stat. Ann. §1–72.2 (2021); Berger v. North Carolina State Conference of the NAACP, 597 U. S. ___, ___, ___–___ (2022) (slip op., at 2, 8–9), raised defenses under both state and federal law. As relevant here, they argued: (1) that partisan-gerrymandering claims are not justiciable under the North Carolina Constitution; and (2) that the State Constitution cannot restrict the General Assembly’s con- gressional districting legislation under the federal Elec- tions Clause, U. S. Const., Art. I, §4, cl. 1. Initially, a three-judge trial court endorsed petitioners’ state-law defense and entered a final judgment dismissing plaintiffs-respondents’ claims with prejudice. But, on ap- peal, the North Carolina Supreme Court reversed that judgment. See Harper v. Hall, 380 N. C. 317, 868 S. E. 2d 499 (2022) (Harper I). In Harper I, the court held that the 2021 Act violated the State Constitution, enjoined its im- plementation, and remanded the case to the trial court for remedial proceedings. In doing so, Harper I rejected both petitioners’ state-law justiciability defense and their fed- eral Elections Clause defense. Petitioners then sought this Court’s review of Harper I insofar as it rejected their federal defense. From the start, they faced a significant jurisdictional question. Our appel-

—————— 1 Technically, there were two state-court actions below. These actions

have been consolidated at every stage and can be regarded as one action for all relevant purposes. For simplicity, I will use the singular. Also for simplicity, I focus here on plaintiffs-respondents’ challenge to the 2021 congressional districting map, putting aside their parallel challenges to the Assembly’s 2021 State House and State Senate maps. 4 MOORE v. HARPER

late jurisdiction over state courts is limited to “[f]inal judg- ments or decrees rendered by the highest court of a State in which a decision could be had.” 28 U. S. C. §1257(a). But Harper I was “a classic example of non-finality”; it was an order that resolved the issue of liability and remanded for remedial proceedings. Taylor v. Board of Ed. of City School Dist. of New Rochelle, 288 F. 2d 600, 602 (CA2 1961) (Friendly, J.). Thus, under the normal rules, Harper I would not be “reviewable by this Court.” Jefferson v. City of Tarrant, 522 U. S. 75, 81 (1997). Nonetheless, this Court’s precedents have recognized “a limited set of situations” in which “finality as to [a] federal issue” permits our review, even in the absence of a final judgment as to the case. O’Dell v. Espinoza, 456 U. S. 430 (1982) (per curiam) (emphasis added). In granting certio- rari, we relied on one of those doctrinal exceptions, prem- ised on the assumption that “the federal issue” in this case would “survive and require decision regardless of the out- come of future state-court proceedings.” Cox Broadcasting Corp. v. Cohn, 420 U. S. 469, 480 (1975). As it turned out, that assumption was wrong. After Har- per I, on remand, the trial court adopted a remedial district- ing plan for the 2022 elections. Petitioners then appealed that order, taking the case to the North Carolina Supreme Court for a second time. Initially, the North Carolina Su- preme Court released an opinion applying Harper I and af- firming the trial court’s decree. Harper v. Hall, 383 N. C. 89, 881 S. E. 2d 156 (2022) (Harper II ). But then, after granting petitioners’ request for rehearing, the court “re- visit[ed] the crucial issue in this case: whether claims of partisan gerrymandering are justiciable under the state constitution.” Harper v. Hall, ___ N. C. ___, ___, 886 S. E. 2d 393, 399 (2023) (Harper III ). After reexamining “the fundamental premises underlying the decisions in both Harper II and Harper I,” the court “h[e]ld that partisan ger- Cite as: 600 U. S. ____ (2023) 5

rymandering claims present a political question that is non- justiciable under the North Carolina Constitution.” Id., at ___–___, 886 S. E. 2d, at 400–401. It concluded: “This Court’s opinion in Harper I is overruled. We affirm the three-judge panel’s [original] 11 January 2022 Judgment concluding, inter alia, that claims of partisan gerrymandering present nonjusticiable, polit- ical questions and dismissing all of plaintiffs’ claims with prejudice. This Court’s opinion in Harper II is withdrawn and superseded by this opinion. The three- judge panel’s 23 February 2022 order addressing the Remedial Plans is vacated. Plaintiffs’ claims are dis- missed with prejudice.” Id., at ___, 886 S. E. 2d, at 449. In short, this case is over, and petitioners won. The trial court’s original final judgment in favor of petitioners, af- firmed by the State Supreme Court in Harper III, repre- sents “the final determination of the rights of the parties” in this case. N. C. Rule Civ. Proc. 54(a) (2023). Harper I has been overruled, and plaintiffs-respondents’ claims for relief have been dismissed on adequate and independent state-law grounds. As a result, petitioners’ alternative Elections Clause defense to those claims no longer requires decision; the merits of that defense simply have no bearing on the judgment between the parties in this action. That is the definition of mootness for an issue. It follows that no live controversy remains before this Court. For any case or controversy to exist here, petitioners must be injured by the judgment below, and we must be able to redress that injury by acting upon that judgment. See, e.g., Food Marketing Institute v. Argus Leader Media, 588 U. S. ___, ___ (2019) (slip op., at 4); see also Ex parte Bollman, 4 Cranch 75, 86 (1807) (“The criterion [of] appel- late . . . jurisdiction, is that it revises and corrects the deci- sions of another tribunal”). But petitioners are not injured by the judgment of Harper I at all, nor could we redress any 6 MOORE v. HARPER

injury to petitioners by doing anything to it. Whether we accept or reject petitioners’ Elections Clause defense, plaintiffs-respondents’ claims remain dismissed. As far as this case is concerned, there simply is nothing this Court could decide that could make any difference to who wins or what happens next in any lower court. That is the defini- tion of mootness for an appellate proceeding. The United States understands this. See Supplemental Letter Brief for United States as Amicus Curiae 3 (May 11, 2023) (“[T]he question this Court granted certiorari to de- cide is now moot because the Court’s resolution of that ques- tion could not affect the disposition of this case”). So do the elections officials whose conduct Harper I once enjoined. Supplemental Brief for State Respondents 1 (May 11, 2023) (“[T]his case is moot”). So, too, do the plaintiffs-respondents who started this case in the first place. See Letter Brief for North Carolina League of Conservation Voters, Inc., et al. 2 (May 11, 2023) (“The North Carolina Supreme Court’s February 2022 judgment reversing the same January 11, 2022 trial-court judgment that the North Carolina Supreme Court just affirmed is now a nullity”); Supplemental Letter Brief for Rebecca Harper et al. 1 (May 11, 2023) (“Petition- ers have won a full victory in state court”). As one group of plaintiffs-respondents put it, “there is no non-frivolous ba- sis for jurisdiction here.” Ibid. B The majority does not contest that the Elections Clause issue in this case was only a defense to plaintiffs- respondents’ claims for relief. Nor does it deny that Harper III overruled Harper I and affirmed the very same trial- court judgment that Harper I had reversed. And it concedes that, as a result, plaintiffs-respondents’ claims have been dismissed in full on state-law nonjusticiability grounds. Thus, the majority does not contend that its opinion on the Cite as: 600 U. S. ____ (2023) 7

Elections Clause issue could make any difference to the fi- nal judgment “adjudicating all the claims and the rights and liabilities of all the parties” in this case. N. C. Rule Civ. Proc. 54(b). That should be the end of the discussion. Be- cause the question presented “cannot affect the rights of [the] litigants in the case before [us],” we “are without power to decide” it. North Carolina v. Rice, 404 U. S. 244, 246 (1971) (per curiam). Nonetheless, the majority finds that the judgment below still presents a live Article III case or controversy; it then further concludes that the question presented has survived and requires decision under Cox Broadcasting.2 See ante, at 6–11. In doing so, it relies extensively on petitioners’ “representations” that they “remain bound by the judgment in Harper I.” Ante, at 10; see also ante, at 5, 7, 11. But, of course, parties’ mere representations that they are injured never carry their “burden of demonstrating that they have standing” in this Court. TransUnion LLC v. Ramirez, 594 U. S. ___, ___ (2021) (slip op., at 15) (emphasis added). Nor can such representations affect our “independent obligation to assure ourselves that jurisdiction is proper before pro- ceeding to the merits.” Plains Commerce Bank v. Long Family Land & Cattle Co., 554 U. S. 316, 324 (2008). To ensure that it has jurisdiction here, the majority must explain how petitioners’ federal defense could still affect “the rights of [the] litigants in th[is] case.” Rice, 404 U. S., at 246. It fails to do so. Instead, it mostly points to irrele-

—————— 2 In this case, these two inquiries are identical, making the majority’s

bifurcated analysis somewhat artificial. To say that an issue “will sur- vive and require decision,” as Cox Broadcasting uses the phrase, simply means that it will not become moot, generally through some other issue independently resolving the case (precisely what happened here). See, e.g., Pierce County v. Guillen, 537 U. S. 129, 141, n. 5 (2003); Florida v. Thomas, 532 U. S. 774, 779 (2001); Jefferson v. City of Tarrant, 522 U. S. 75, 82–83 (1997); Cox Broadcasting, 420 U. S., at 478, 480–481, and n. 9. 8 MOORE v. HARPER

vant facts about the procedural history of this case and mis- applies civil-procedure rules as if Harper I and Harper III did not involve the same case. But the error that actually drives the majority’s conclusion is much deeper. The ma- jority evidently thinks that when Harper I held the 2021 Act unconstitutional, it entered a “judgment” affecting the 2021 Act as a statute, independent of its application to the legal rights of the litigants in this case. And the majority thinks that to reverse Harper I ’s “judgment” would “negate the force of its order striking down” the Act, thus “alter[ing] the presently operative statutes of North Carolina.” Ante, at 7 (internal quotation marks omitted). But, of course, the judicial power does not “operate on legal rules in the ab- stract”; it operates on the rights and liabilities of contend- ing parties with adverse legal interests. California v. Texas, 593 U. S. ___, ___ (2021) (slip op., at 8) (internal quo- tation marks omitted). The majority’s reasoning cannot be squared with the judicial power vested by the Constitution, the case-or-controversy requirement, or the nature of judi- cial review. I start by clearing away some of the brush. True, Harper III did not expressly “revisit” the Elections Clause issue, ante, at 6; true as well, petitioners did not obtain rehearing of Harper I, see ante, at 7. But none of that matters because Harper III ’s final judgment mooted the Elections Clause is- sue in this case by dismissing plaintiffs-respondents’ claims on alternative state-law grounds.3 Likewise, the idea that —————— 3 Incidentally, the majority seriously errs when it says that Harper III

“reaffirmed” Harper I ’s Elections Clause holding, ante, at 9, apparently referencing Harper III ’s statement that “[t]he General Assembly exer- cises [redistricting] authority subject to the express limitations in our constitution and in federal law,” ___ N. C., at ___, 886 S. E. 2d, at 422; see also ante, at 6. The only “express limitations” Harper III meant were “Article II, Sections 3 and 5,” of the State Constitution, which address only state-legislative districts. ___ N. C., at ___, 886 S. E. 2d, at 422. As Harper III acknowledged, “there is no provision in the state constitution Cite as: 600 U. S. ____ (2023) 9

Harper III did not “alter or amend in any way the judgment in Harper I,” ante, at 9, is both irrelevant and incorrect. It is irrelevant because our jurisdiction requires a case, and this case is over no matter what becomes of the empty husk of Harper I ’s interlocutory judgment. It is incorrect because Harper I ’s judgment—reversing the trial court’s original judgment and remanding the case—was completely ne- gated by Harper III ’s affirmance of the same trial-court judgment. In the same vein, the majority’s suggestion that Harper I has any “res judicata consequences” is completely inappo- site. Ante, at 9 (internal quotation marks omitted). Res judicata is the principle that “[a] final judgment on the mer- its of an action” bars relitigation “in [a] second action” of the same claim or of issues actually litigated and necessary to the judgment in the first action. Federated Department Stores, Inc. v. Moitie, 452 U. S. 394, 398 (1981); see also Taylor v. Sturgell, 553 U. S. 880, 892 (2008). Harper I was not a final judgment (as the majority concedes by applying Cox Broadcasting), so res judicata simply has nothing to do with it. Nothing decided by Harper I was res judicata in the second state-court appeal, see Southern R. Co. v. Clift, 260 U. S. 316, 319 (1922), nor would Harper I ’s interlocutory Elections Clause holding have any res judicata effect in a future action between these parties, see Restatement (Sec- ond) of Judgments §27, and Comment h, and Illus. 13 and 14 (1980) (only issue determinations essential to a final —————— regarding redistricting of congressional districts.” Id., at ___, 886 S. E. 2d, at 419. To the extent that Harper III suggests any view about whether such provisions would be binding if they existed, it seems to suggest agreement with petitioners. See ibid. (“The Federal Constitu- tion . . . commits drawing of congressional districts to the state legisla- tures subject to oversight by the Congress of the United States”). But, of course, Harper III had no need to decide that question, because its state- law justiciability holding fully determined the judgment in this action, thus mooting petitioners’ alternative Elections Clause defense. 10 MOORE v. HARPER

judgment have preclusive effect; if a defendant obtains a fi- nal judgment based on one defense, the court’s rejection of alternative defenses is not preclusive in a later action). At the risk of belaboring the obvious, the clearest proof that Harper I was not a final judgment is Harper III—which “re- visit[ed]” Harper I ’s determination of a “crucial issue in this case,” ___ N. C., at ___, 886 S. E. 2d, at 399; overruled Har- per I ’s determination of that issue; and affirmed the very same final judgment for petitioners that Harper I had re- versed.4 How could petitioners still be injured, and what more could this Court possibly do for them? The majority sug- gests that the interlocutory injunction issued in Harper I still harms petitioners, see ante, at 7, 10–11, but that idea is untenable. To start, the majority overlooks that the in- junction only ran against the conduct of defendants- respondents—the state officials who actually implement election laws—not petitioners as legislators. See Berger, 597 U. S., at ___ (slip op., at 2). Next, the majority fails to consider what it would mean if the injunction is still bind- ing: that defendants-respondents are liable to “be held in contempt and put in jail” if they ever implement the 2021 Act, Richmond Cty. Bd. of Ed. v. Cowell, 254 N. C. App. 422, 426, 803 S. E. 2d 27, 30–31 (2017), even though Harper III dismissed this suit’s challenge to the Act as “beyond the reach of [North Carolina’s] courts,” ___ N. C., at ___, 886 S. E. 2d, at 431 (internal quotation marks omitted). That —————— 4 These facts refute the majority’s dismissive reference to Harper III as

“a distinct decision concerning remedies,” as well as any suggestion that Harper III was “another case” than Harper I for res judicata purposes. Ante, at 9–10 (internal quotation marks omitted). Harper I and Harper III involved exactly the same case, and there is “only one final judgment per case.” Chaka v. Lane, 894 F. 2d 923, 924 (CA7 1990) (Easterbrook, J.); see also Insurance Co. v. Dunn, 19 Wall. 214, 225 (1874) (“To say that there can be two final judgments upon the same pleadings, in the same cause, in the same court, . . . involves a solecism”). In this case, it was not Harper I. Cite as: 600 U. S. ____ (2023) 11

idea defies both common sense and civil procedure. A court simply does not go on enforcing an interlocutory injunc- tion—and imposing contempt sanctions for disobedience— after reaching a final judgment dismissing every relevant claim for relief. Rather, the interlocutory injunction (like all interlocutory orders) merges into the final judgment fully “adjudicating all the claims and the rights and liabil- ities of all the parties” to the case. N. C. Rule Civ. Proc. 54(b) (emphasis added). “With the entry of [Harper III ’s] final judgment, the life of [Harper I ’s] injunction came to an end, and it no longer ha[s] a binding effect on any one.” Madison Square Garden Boxing, Inc. v. Shavers, 562 F. 2d 141, 144 (CA2 1977). In any event, the majority’s analysis plainly does not turn on the belief that any defendant remains liable to potential contempt sanctions and jail time. Instead, its animating idea (uncritically borrowed from petitioners) is that Harper I ’s “judgment” operated against the 2021 Act as a statute. The majority describes Harper I ’s “judgment” interchange- ably as “enjoining the use of the 2021 ma[p]” and “striking down the 2021 pla[n].” Ante, at 7, 9. It then reasons that reversing that “judgment” would “negate the force of its or- der striking down the 2021 pla[n],” thus “alter[ing] the presently operative statutes of North Carolina” such that the 2021 Act would “again take effect.” Ante, at 7–8 (inter- nal quotation marks omitted). The majority regards this aspect of Harper I ’s “judgment” as entirely independent of Harper III ’s final resolution of the claims in this case. See ante, at 5–8, 10–11. And it finds its theory “confirm[ed]” by a proviso in a remedial redistricting Act, passed immedi- ately after Harper I, stating that the 2021 Act would “again become effective” if this Court reversed Harper I. Ante, at 8 (internal quotation marks omitted). In short, the “case or controversy” that the majority thinks is still before us has nothing to do with the parties’ rights and liabilities on the claims asserted in this action; rather, it is simply whether 12 MOORE v. HARPER

a particular legislative Act, which Harper I supposedly made inoperative, will again be “operative” or “effective” as a state statute. Ante, at 7–8 (internal quotation marks omitted). This reasoning bears no connection to the judicial power of this Court or the court below. Judicial power is the power to adjudicate “definite and concrete” disputes “touching the legal relations of parties having adverse legal interests,” Rice, 404 U. S., at 246 (internal quotation marks omitted), by “determin[ing] the respective rights and liabilities or du- ties” of the parties before a court in a particular case, Ni- cholson v. State Ed. Assistance Auth., 275 N. C. 439, 447, 168 S. E. 2d 401, 406 (1969). Thus, a judgment binds the rights of the parties in that case, see Taylor, 553 U. S., at 892–893, and it awards remedies that “operate with respect to [those] specific parties,” California, 593 U. S., at ___ (slip op., at 8) (internal quotation marks omitted). In deciding any case, the court must “ascertai[n] and declar[e] the law applicable to the controversy”; this duty, in turn, implies “the negative power to disregard an unconstitutional enact- ment” in deciding the case. Massachusetts v. Mellon, 262 U. S. 447, 488 (1923); accord, Nicholson, 275 N. C., at 447, 168 S. E. 2d, at 406; Marbury v. Madison, 1 Cranch 137, 176–178 (1803). But this negative power of judicial review is not a “power per se to review and annul acts of [legisla- tion] on the ground that they are unconstitutional,” Mellon, 262 U. S., at 488; “to change or to repeal statutes,” Person v. Doughton, 186 N. C. 723, 725, 120 S. E. 481, 483 (1923); or to issue orders that “operate on legal rules in the ab- stract,” California, 593 U. S., at ___ (slip op., at 8) (internal quotation marks omitted). Courts of law simply do not ren- der “judgments” that toggle statutes from “operative” to “in- operative” and back again, as if judicial review were some sort of in rem jurisdiction over legislative Acts. Indeed, such a conception would contradict the most basic Cite as: 600 U. S. ____ (2023) 13

premise of judicial review itself. “[A]n unconstitutional pro- vision is never really part of the body of governing law,” for “the Constitution automatically displaces [it] from the mo- ment of [its] enactment.” Collins v. Yellen, 594 U. S. ___, ___ (2021) (slip op., at 35) (emphasis added). Thus, when a court holds a statute unconstitutional, it is emphatically not depriving it of any legal force that it previously pos- sessed as an Act. The court is only deciding “a particular case” “conformably to the constitution, disregarding” a stat- ute that cannot “govern the case” because it is already “void.” Marbury, 1 Cranch, at 178; accord, Bayard v. Sin- gleton, 1 N. C. 5, 7 (1787) (holding that the unconstitutional “act on which [a party’s] motion was grounded . . . must of course, in that instance, stand as abrogated and without any effect”). “That is the classic explanation for the basis of judicial review” set forth in Marbury and Bayard, and it re- mains “from that day to this the sole continuing rationale for the exercise of this judicial power.” Mackey v. United States, 401 U. S. 667, 678 (1971) (Harlan, J., concurring in judgment in part and dissenting in part). The majority’s theory thus fails twice over, both as a de- scription of Harper I ’s “judgment” and as an explanation of how any justiciable controversy could exist in this Court. The only power that the North Carolina courts exercised at any stage of this case was that of “determin[ing] the respec- tive rights and liabilities or duties of litigants in [the] con- troversy” before them. Nicholson, 275 N. C., at 447, 168 S. E. 2d, at 406. Harper I ’s judgment line did not read: “Stricken down,” referring to the 2021 Act, but instead: “Re- versed and remanded,” referring to the lower court judg- ment and the case between these parties. 380 N. C., at 404, 868 S. E. 2d, at 560 (some capitalization deleted). The ju- dicial power operates upon parties and cases, not statutes, 14 MOORE v. HARPER

and Harper I was no exception.5 Even if it were, we would still have no case or controversy in front of us. A freestanding “judgment” of statutory inval- idation—neutralizing the 2021 Act in some manner trans- cending the final determination of the parties’ respective rights in this case—would not be a judicial action within the meaning of Article III, and it could not be reviewed in this Court. See Prentis v. Atlantic Coast Line Co., 211 U. S. 210, 226–227 (1908). “We sit as a court of law, not a council of revision,” and “[o]ur powers of judicial review are judicial, not legislative, in nature.” Mackey, 401 U. S., at 697 (opin- ion of Harlan, J.). The only power that we ever could have exercised here was to modify the adjudicated rights and li- abilities of the parties with respect to the claims in this ac- tion. Because we plainly cannot do so, no matter what we think about the Elections Clause, this proceeding is moot. —————— 5 Nor did Harper III, despite agreeing with petitioners in all other re-

spects, anywhere endorse their belief that some “order striking down the 2021 [Act]” would survive a decision overruling Harper I and dismissing this lawsuit with prejudice. Ante, at 5 (internal quotation marks omit- ted). To the extent that the majority imputes that idea to Harper III, it again seriously misreads that decision. See n. 3, supra. The majority states that Harper III “did not reinstate the 2021 congressional pla[n] that Harper I had struck down.” Ante, at 5 (citing Harper III, ___ N. C., at ___–___, 886 S. E. 2d, at 446–448). But the part of Harper III that the majority cites had nothing to do with North Carolina’s congressional plan. Instead, it considered whether two state-constitutional provisions, which require that state-legislature districting plans “remain unaltered” until the next census after they have become “established,” N. C. Const., Art. II, §§3(4) and 5(4), prevented the Assembly from revising the 2021 state plans that Harper I had rejected. See Harper III, ___ N. C., at ___– ___, 886 S. E. 2d, at 446–448. In determining that the 2021 state plans were never “established,” Harper III did not mean that Harper I some- how still restrains those plans; rather, it indicated that those plans them- selves do not restrain the Assembly going forward. Absolutely nothing in Harper III suggests that the North Carolina Supreme Court’s judg- ments act directly upon legislative enactments—“striking them down” today and “reinstating” them tomorrow—or that the 2021 congressional map remains subject to any restraint left over from Harper I. Cite as: 600 U. S. ____ (2023) 15

And the idea that we could still decide petitioners’ moot fed- eral defense because it could “alter the presently operative statutes of North Carolina”—even if it cannot affect the ul- timate judgment in this action—is wholly foreign to Article III. Ante, at 7 (internal quotation marks omitted). In that light, the post-Harper I remedial Act and its “trig- ger provisio[n]” plainly can make no difference to our juris- diction or lack thereof. Ante, at 8. When passed, that Act was essentially a change in the State’s conduct under judi- cial constraint (the result of Harper I ), but with the de- clared intention of resuming the original conduct if that constraint were removed. That declaration kept the contro- versy alive while the constraint still existed, as in Hunt v. Cromartie, 526 U. S. 541, 545, n. 1 (1999). But, after Har- per III, there is no more constraint in this case. Harper I has been overruled, and plaintiffs-respondents’ claims have been dismissed in a final judgment. Nothing about this case prevents the State from either enacting or implement- ing any districting plan. If “the presently operative statutes of North Carolina” need to be “alter[ed],” that is the General Assembly’s job, not ours. Ante, at 7 (internal quotation marks omitted). Regardless, petitioners have fully pre- vailed in this case, and plaintiffs-respondents have not ob- tained any enforceable relief that could affect the conduct of future elections. Indeed, to the extent the trigger provision adds anything to the majority’s analysis, it only underscores the absence of a justiciable case or controversy.6 A state legislature is

—————— 6 I assume here that the majority is reading the provision correctly,

though it is far from clear that this is actually the case. As relevant, the provision stated that the remedial redistricting plan “is effective contin- gent upon its approval or adoption by the [trial court],” “unless the United States Supreme Court or any other federal court reverses or stays [Harper I ] . . . (or [Harper I ] is otherwise enjoined, made inoperable, or ineffective), and in such case [the 2021 Act] is again effective.” 2022 N. C. 16 MOORE v. HARPER

free to condition the effectiveness of a change in state law on external events, including this Court’s actions in cases properly before it. But, as should be obvious, such a trigger provision cannot be the entire basis of an Article III case or controversy. Where, as here, the Court cannot affect the adjudicated rights and liabilities of the parties in the case below, a state legislature cannot manufacture a justiciable controversy by providing that state law will change in some way depending on how this Court answers a moot question. That would simply be a roundabout way of asking this Court to render an advisory opinion. But “federal courts cannot give answers simply because someone asks.” Uzueg- bunam, 592 U. S., at ___ (ROBERTS, C. J., dissenting) (slip op., at 12). That is true when the request comes from Con- gress, see Muskrat v. United States, 219 U. S. 346, 360–361 (1911), and it is equally true when the request comes from a state legislature.7 —————— Sess. Laws 3, p. 10, §2. The majority’s reading is based on three suppo- sitions that it does not justify. The first is that this provision has any reference at all to events after the 2022 elections, to which the remedial Act was exclusively directed. The second is that the dependent clause following “unless” is applicable even though, under the main clause, the remedial plan was never “adopt[ed]” by the trial court and thus never became “effective.” The third is that Harper III did not “otherwise . . . ma[ke]” Harper I “inoperable, or ineffective.” 7 The idea of deciding an issue to determine whether a statute shall be

effective is not unprecedented, but the precedents do not aid the major- ity. At times, state legislatures have enacted laws contingent on state- court opinions approving their constitutionality—in fact, such legislation produced the first two opinions addressing the Elections Clause question here (which both reached the opposite conclusion from today’s majority). See Act No. 5, 1863 Vt. Acts & Resolves p. 7, approved, Opinion of Judges, 37 Vt. 665 (1864); 1864 N. H. Laws p. 3061, approved, In re Opin- ions of Justices, 45 N. H. 595 (1864); see also In re Plurality Elections, 15 R. I. 617, 8 A. 881 (1887) (similar situation and conclusion). Those opin- ions have always been understood as “advisory opinions.” See, e.g., In re Constitutionality of House Bill 88, 115 Vt. 524, 528–529, 64 A. 2d 169, 171–172 (1949); Goodell v. Judith Basin County, 70 Mont. 222, 231, 224 Cite as: 600 U. S. ____ (2023) 17

In sum, there is no issue before this Court that can affect the judgment in this action. As such, the question pre- sented is moot, and the writ of certiorari should be dis- missed. II I would gladly stop there. The majority’s views on the merits of petitioners’ moot Elections Clause defense are of far less consequence than its mistaken belief that Article III authorizes any merits conclusion in this case, and I do not wish to belabor a question that we have no jurisdiction to decide. Nonetheless, I do not find the majority’s merits reasoning persuasive. The Elections Clause of the Constitution provides that “[t]he Times, Places and Manner of holding Elections for Senators and Representatives, shall be prescribed in each State by the Legislature thereof; but the Congress may at any time by Law make or alter such Regulations, except as to the Places of chusing Senators.” Art. I, §4, cl. 1. The question presented was whether the people of a State can place state-constitutional limits on the times, places, and manners of holding congressional elections that “the Legis- lature” of the State has the power to prescribe. Petitioners said no. Their position rests on three premises, from which the conclusion follows. The first premise is that “the people of a single State” lack any ability to limit powers “given by the people of the United States” as a whole. McCulloch v. Maryland, 4 Wheat. 316, 429 (1819). This idea should be uncontrover- sial, as it is “the unavoidable consequence of th[e] suprem- acy” of the Federal Constitution and laws. Id., at 436. As the Court once put it (in a case about the Article V ratifying power of state legislatures), “a federal function derived from the Federal Constitution . . . transcends any limitations —————— P. 1110, 1112 (1924). Such advisory opinions may be authorized by some state constitutions, but Article III gives this Court no such power. 18 MOORE v. HARPER

sought to be imposed by the people of a State.” Leser v. Garnett, 258 U. S. 130, 137 (1922). The second premise is that regulating the times, places, and manner of congressional elections “ ‘is no original pre- rogative of state power,’ ” so that “such power ‘had to be del- egated to, rather than reserved by, the States.’ ” Cook v. Gralike, 531 U. S. 510, 522 (2001) (first quoting 1 J. Story, Commentaries on the Constitution of the United States §627 (3d ed. 1858) (Story); then quoting U. S. Term Limits, Inc. v. Thornton, 514 U. S. 779, 804 (1995)). This premise is firmly supported by this Court’s precedents, which have also held that the Elections Clause is “the exclusive delega- tion of ” such power, as “[n]o other constitutional provision gives the States authority over congressional elections.” Cook, 531 U. S., at 522–523; see also United States v. Clas- sic, 313 U. S. 299, 315 (1941) (“While, in a loose sense, the right to vote for representatives in Congress is sometimes spoken of as a right derived from the states, this statement is true only in the sense that the states are authorized by the Constitution, to legislate on the subject as provided by [the Elections Clause]” (citations omitted)). The third premise is that “the Legislature thereof ” does not mean the people of the State or the State as an undif- ferentiated body politic, but, rather, the lawmaking power as it exists under the State Constitution. This premise com- ports with the usual constitutional meanings of the words “State” and “Legislature,” as well as this Court’s prece- dents. “A state, and the legislature of a state, are quite dif- ferent political beings.” Story §628. “A state, in the ordi- nary sense of the Constitution, is a political community of free citizens . . . organized under a government sanctioned and limited by a written constitution.” Texas v. White, 7 Wall. 700, 721 (1869). “ ‘Legislature,’ ” on the other hand, generally means “ ‘the representative body which ma[kes] the laws of the people.’ ” Smiley v. Holm, 285 U. S. 355, 365 (1932) (quoting Hawke v. Smith, 253 U. S. 221, 227 (1920)). Cite as: 600 U. S. ____ (2023) 19

To be sure, the precise constitutional significance of the word “Legislature” depends on “the function to be per- formed” under the provision in question. Smiley, 285 U. S., at 365. Because “the function contemplated by” the Elec- tions Clause “is that of making laws,” id., at 366, this Court’s Elections Clause cases have consistently looked to a State’s written constitution to determine the constitu- tional actors in whom lawmaking power is vested. See Ar- izona State Legislature v. Arizona Independent Redistrict- ing Comm’n, 576 U. S. 787, 795–796, 814 (2015); Smiley, 285 U. S., at 363; Ohio ex rel. Davis v. Hildebrant, 241 U. S. 565, 566–568 (1916).8 The definitions that most precisely explain this Court’s holdings were given in a state-court case that anticipated Hildebrant and Smiley by several years: “[T]he word ‘Legislature,’ as used in [the Elections Clause] means the lawmaking body or power of the state, as established by the state Constitution,” or, put differently, “that body of persons within a state clothed with authority —————— 8 The only complications with this approach have arisen where a State

Constitution did not vest the legislative power wholly in a single repre- sentative body, as the Federal Constitution appears to presuppose. Thus, in Hildebrant, the Court rejected as nonjusticiable an argument “that to include the referendum within state legislative power for the purpose of apportionment” was “repugnant to” the Elections Clause. 241 U. S., at 569. Somewhat similarly, in Arizona State Legislature, the Court faced a State Constitution “in which the people of a State exercise legislative power coextensive with the authority of an institutional legis- lature,” 576 U. S., at 819, with the majority “see[ing] no constitutional barrier to a State’s empowerment of its people by embracing that form of lawmaking,” id., at 808–809. As relevant to identifying the State’s “Leg- islature,” the majority opinion emphasized that Arizona’s written Con- stitution “ ‘establishes the electorate of Arizona as a coordinate source of legislation’ on equal footing with the representative legislative body,” id., at 795 (alteration omitted), and thus held that “lawmaking power in Ar- izona includes the initiative process,” id., at 793; see also id., at 814. No such complications exist in North Carolina, where the State Constitution simply provides that “[t]he legislative power of the State shall be vested in the General Assembly.” Art. II, §1. 20 MOORE v. HARPER

to make the laws.” State ex rel. Schrader v. Polley, 26 S. D. 5, 10–11, 127 N. W. 848, 850–851 (1910). If these premises hold, then petitioners’ conclusion fol- lows: In prescribing the times, places, and manner of con- gressional elections, “the lawmaking body or power of the state, as established by the state Constitution,” id., at 10, 127 N. W., at 850, performs “a federal function derived from the Federal Constitution,” which thus “transcends any lim- itations sought to be imposed by the people of a State,” Le- ser, 258 U. S., at 137. As shown, each premise is easily sup- ported and consistent with this Court’s precedents. Petitioners’ conclusion also mirrors the Court’s interpreta- tion of parallel language in the Electors Clause9 in McPher- son v. Blacker, 146 U. S. 1 (1892): “[T]he words, ‘in such manner as the legislature thereof may direct,’ ” “operat[e] as a limitation upon the State in respect of any attempt to circumscribe the legislative power.” Id., at 25.10 The majority rejects petitioners’ conclusion, but seem- ingly without rejecting any of the premises from which that conclusion follows. Its apparent rationale—that Hilde- brant, Smiley, and Arizona State Legislature have already foreclosed petitioners’ argument—is untenable, as it re- quires disregarding a principled distinction between the is- sues in those cases and the question presented here. In those cases, the relevant state-constitutional provisions ad- dressed the allocation of lawmaking power within each

—————— 9 The Electors Clause provides that “[e]ach State shall appoint, in such

Manner as the Legislature thereof may direct, a Number of Electors” for the election of the President and Vice President. Art. II, §1, cl. 2. 10 Contrary to the majority’s suggestion of ambiguity, see ante, at 20,

this statement can only have meant that the state legislature’s power to direct the manner of appointing electors may not be limited by the state constitution. No other “limitation upon the State” is possible, for, as the McPherson Court said just a few sentences earlier, “the constitution of the State” is the only “authority” that ordinarily “limit[s]” “[t]he legisla- tive power.” 146 U. S., at 25. Cite as: 600 U. S. ____ (2023) 21

State; they defined what acts, performed by which constitu- tional actors, constituted an “exercise of the lawmaking power.” Smiley, 285 U. S., at 364; cf. U. S. Const., Art. I, §7, cl. 2 (describing the processes upon completion of which a bill “become[s] a Law”). In other words, those cases ad- dressed how to identify “the Legislature” of each State. But, nothing in their holdings speaks at all to whether the peo- ple of a State can impose substantive limits on the times, places, and manners that a procedurally complete exercise of the lawmaking power may validly prescribe. These are simply different questions: “There is a difference between how and what.” J. Kirby, Limitations on the Power of State Legislatures Over Presidential Elections, 27 Law & Con- temp. Prob. 495, 503 (1962). This is not an arbitrary distinction, but one rooted in the logic of petitioners’ argument. No one here contends that the Elections Clause creates state legislatures or defines “the legislative process” in any State. Smiley, 285 U. S., at 369. Thus, while the Elections Clause confers a lawmaking power, “the exercise of th[at] authority must” follow “the method which the State has prescribed for legislative en- actments.” Id., at 367. But, if the power in question is not original to the people of each State and is conferred upon the constituted legislature of the State, then it follows that the people of the State may not dictate what laws can be enacted under that power—precisely as they may not dic- tate what constitutional amendments their legislatures can ratify under Article V. See Leser, 258 U. S., at 137.11 Ac-

—————— 11 The majority states that Smiley “already distinguished” Leser as in-

volving a nonlawmaking function. Ante, at 21. But Smiley distinguished the “electoral,” “ratifying,” and “consenting” functions of state legisla- tures from their “lawmaking” function under the Elections Clause, 285 U. S., at 365–366, only to explain why the last function must be “exer- 22 MOORE v. HARPER

cordingly, if petitioners’ premises hold, then state constitu- tions may specify who constitute “the Legislature” and pre- scribe how legislative power is exercised, but they cannot control what substantive laws can be made for federal elec- tions. The majority indicates that it does not perceive this dis- tinction between “substantive” and “procedural” rules, see ante, at 23–24,12 illustrating its doubts with a rhetorical question: “When a governor vetoes a bill because of a disa- greement with its policy consequences, has the governor ex- ercised a procedural or substantive restraint on lawmak- ing?” Ante, at 24. The answer is straightforward: The power of approving or vetoing bills is “a part of the legisla- tive process” because it is “a part in the making of state laws.” Smiley, 285 U. S., at 368–369; see also INS v. Chadha, 462 U. S. 919, 933, 951, 954, 957, n. 22, 958 (1983) (repeatedly referring to bicameralism and presentment as —————— cise[d] . . . in accordance with the [State’s] method . . . for legislative en- actments,” id., at 367, including “the participation of the Governor wher- ever the state constitution provided for such participation as part of the process of making laws,” id., at 370. Nothing in Smiley even hints that a federally delegated power fails to “transcen[d] limitations sought to be imposed by the people of a State” simply because it is a lawmaking func- tion. Leser, 258 U. S., at 137. 12 This admission carries troubling implications for other fields, as

comparable “distinction[s] between procedure and substance [are] not unknown in the law.” United States v. Kras, 409 U. S. 434, 463, n. 6 (1973) (Marshall, J., dissenting). For example, our habeas corpus juris- prudence has long distinguished “substantive” constitutional rules from “procedural” ones. Schriro v. Summerlin, 542 U. S. 348, 352, 353 (2004). Our sentencing appellate review jurisprudence similarly recognizes a distinction between the “procedura[l] sound[ness]” of a sentencing deci- sion and “the substantive reasonableness of the sentence imposed.” Gall v. United States, 552 U. S. 38, 51 (2007). And, no less essential a statute than the Rules Enabling Act presupposes a meaningful distinction be- tween “rules of practice and procedure” and matters of “substantive right.” 28 U. S. C. §§2072(a) and (b). Indeed, the constitutionality of the Act rests upon this very distinction. See Hanna v. Plumer, 380 U. S. 460, 470–472 (1965); Sibbach v. Wilson & Co., 312 U. S. 1, 9–10 (1941). Cite as: 600 U. S. ____ (2023) 23

the “procedure” or “procedures” of lawmaking). A Gover- nor’s motives for vetoing a certain bill are irrelevant to the effect of the veto as part of the legislative process, just as the motives that may lead one house of the legislature to reject a bill passed by the other house are irrelevant to the effect of its doing so. Put simply, when this power is con- ferred on the Governor of a State, it “makes him in effect a third branch of the legislature.” T. Cooley, General Princi- ples of Constitutional Law 50 (1880) (emphasis added); ac- cord, Arizona State Legislature, 576 U. S., at 833 (ROBERTS, C. J., dissenting) (noting that “approving [and] vetoing bills” are “legislative functions”); Chadha, 462 U. S., at 947 (explaining that “lawmaking” is “a power . . . shared by both Houses and the President”); La Abra Silver Mining Co. v. United States, 175 U. S. 423, 453 (1899) (noting that Presi- dential approval “is legislative in its nature”); cf. 1 W. Blackstone, Commentaries on the Laws of England 150 (1765) (“[T]he king is himself a part of the parliament”). This is a question of who, not what, and thus is “a matter of state polity” as far as the Elections Clause is concerned. Smiley, 285 U. S., at 368. But substantive constraints on what the lawmaking power can do (gubernatorial approval included) demand an entirely different justification—one that the majority never provides. It does not overrule Cook and Thornton to hold that the power to prescribe times, places, and manners for congressional elections is an original power of the people of each State. Nor does it hold that the people are themselves “the Legislature” to which the Federal Constitution dele- gates that power. See ante, at 17–18. Indeed, the majority devotes little attention to the source and recipient of the power described in the Elections Clause, notwithstanding their direct relevance to the question presented. Instead, the majority focuses on the power of state courts to exercise “judicial review” of Elections Clause legislation. See ante, at 11–15, 26–30. But that power sheds no light 24 MOORE v. HARPER

on the question presented. In every case properly before it, any court—state or federal—must ascertain and apply the substantive law that properly governs that case. Thus, the court naturally must apply the Federal Constitution rather than any statute in conflict with it. The court must also apply the state constitution over any conflicting statute en- acted under a power limited by that constitution. Petition- ers’ argument, however, is that legislation about the times, places, and manner of congressional elections is not limited by state constitutions—because the power to regulate those subjects comes from the Federal Constitution, not the peo- ple of the State. Right or wrong, this question has nothing to do with whether state courts have the power to conduct judicial review in the first place. To say that “state judicial review” authorizes applying state constitutions over con- flicting Elections Clause legislation, ante, at 15, is simply to assume away petitioners’ argument. III The majority opinion ends with some general advice to state and lower federal courts on how to exercise “judicial review” “in cases implicating the Elections Clause.” Ante, at 28. As the majority offers no clear rationale for its inter- pretation of the Clause, it is impossible to be sure what the consequences of that interpretation will be. However, judg- ing from the majority’s brief sketch of the regime it envi- sions, I worry that today’s opinion portends serious troubles ahead for the Judiciary. The majority uses the separate writings in Bush v. Gore, 531 U. S. 98 (2000) (per curiam), as a loose touchstone for the kind of judicial review that it apparently expects federal courts to conduct in future cases like this one. On its face, this is an awkward analogy, for there is a significant differ- ence between Bush and Harper I. In Bush, the state court’s judgment was based on an interpretation of state statutory law, enacted by the state legislature. Thus, the relevant Cite as: 600 U. S. ____ (2023) 25

Electors Clause question was whether, in doing so, the state court had departed from “the clearly expressed intent of the legislature,” 531 U. S., at 120 (Rehnquist, C. J., concur- ring), “impermissibly distort[ing]” the legislature’s enact- ments “beyond what a fair reading required,” id., at 115. In Harper I, by contrast, there was no doubt that the state court departed from the clearly expressed intent of the leg- islature; it rejected the legislature’s enactment as unconsti- tutional. By doing so, today’s majority concludes, Harper I did not commit per se error, as the Elections Clause permits state courts to apply substantive state-constitutional provisions to the times, places, and manner of federal elections. At the same time, state courts are warned that they operate under federal-court supervision, lest they “transgress the ordi- nary bounds of judicial review such that they arrogate to themselves the power vested in state legislatures to regu- late federal elections.” Ante, at 29. Thus, under the major- ity’s framework, it seems clear that the statutory- interpretation review forecast in Bush (or some version of it) is to be extended to state constitutional law. In this way, the majority opens a new field for Bush-style controversies over state election law—and a far more un- certain one. Though some state constitutions are more “proli[x]” than the Federal Constitution, it is still a general feature of constitutional text that “only its great outlines should be marked.” McCulloch, 4 Wheat., at 407. When “it is a constitution [courts] are expounding,” ibid., not a de- tailed statutory scheme, the standards to judge the fairness of a given interpretation are typically fewer and less defi- nite. Nonetheless, the majority’s framework appears to de- mand that federal courts develop some generalized concept of “the bounds of ordinary judicial review,” ante, at 28; ap- ply it to the task of constitutional interpretation within each State; and make that concept their rule of decision in 26 MOORE v. HARPER

some of the most politically acrimonious and fast-moving cases that come before them. In many cases, it is difficult to imagine what this inquiry could mean in theory, let alone practice. For example, suppose that we were reviewing Harper I under this framework. Perhaps we could have de- termined that reading justiciable prohibitions against par- tisan gerrymandering into the North Carolina Constitution exceeded the bounds of ordinary judicial review in North Carolina; perhaps not. If not, then, in order to ensure that Harper I had not “arrogate[d]” the power of regulating fed- eral elections, ante, at 29, we would presumably have needed to ask next whether it exceeded the bounds of ordi- nary judicial review in North Carolina to find that the spe- cific congressional map here violated those prohibitions. Af- ter all, in constitutional judgments of this kind, it can be difficult to separate the rule from the fact pattern to which the rule is applied. We have held, however, that federal courts are not equipped to judge partisan-gerrymandering questions at all. Rucho v. Common Cause, 588 U. S. ___, ___ (2019) (slip op., at 30). It would seem to follow, a forti- ori, that they are not equipped to judge whether a state court’s partisan-gerrymandering determination surpassed “the bounds of ordinary judicial review.” Even in cases that do not involve a justiciability mis- match, the majority’s advice invites questions of the most far-reaching scope. What are “the bounds of ordinary judi- cial review”? What methods of constitutional interpreta- tion do they allow? Do those methods vary from State to State? And what about stare decisis—are federal courts to review state courts’ treatment of their own precedents for some sort of abuse of discretion? The majority’s framework would seem to require answers to all of these questions and more. In the end, I fear that this framework will have the effect of investing potentially large swaths of state constitutional law with the character of a federal question not amenable Cite as: 600 U. S. ____ (2023) 27

to meaningful or principled adjudication by federal courts. In most cases, it seems likely that the “the bounds of or- dinary judicial review” will be a forgiving standard in practice, and this federalization of state constitutions will serve mainly to swell federal-court dockets with state- constitutional questions to be quickly resolved with generic statements of deference to the state courts. On the other hand, there are bound to be exceptions. They will arise hap- hazardly, in the midst of quickly evolving, politically charged controversies, and the winners of federal elections may be decided by a federal court’s expedited judgment that a state court exceeded “the bounds of ordinary judicial re- view” in construing the state constitution. I would hesitate long before committing the Federal Ju- diciary to this uncertain path. And I certainly would not do so in an advisory opinion, in a moot case, where “the only function remaining to the court is that of announcing the fact and dismissing the cause.” Ex parte McCardle, 7 Wall. 506, 514 (1869). I respectfully dissent.