Enforcement granted by published opinion. Judge ELLIS wrote the majority opinion, in which Judge Murnaghan joined. Judge NIEMEYER wrote a dissenting opinion.
OPINION
ELLIS, District Judge:
The principal question presented in this appeal is whether a union’s promise to waive initiation fees for everyone, if elected, imper-missibly taints the union’s subsequent election. Because we conclude that it does not, and because we conclude that the Regional Director and National Labor Relations Board (“the Board”) did not abuse their discretion with regard to other employer objections to the election, we grant enforcement of the Board’s Order requiring VSA to recognize and bargain with the Union.
I.
VSA Inc. (‘VSA”), a Greensboro, N.C. based company, distributes food products to retail vendors. In October 1991, the Chauffeurs, Teamsters and Helpers Union, Local No. 391 (“Union”), filed a petition with the Board, seeking certification as the representative for all drivers employed in the transportation division of VSA’s Greensboro facility.1 Pursuant to a stipulated election agreement, the Board conducted a secret-ballot election on November 22, 1991, with the Union prevailing by a vote of 11 to 8.
Thereafter VSA, believing that the election was tainted, filed timely objections with the Board’s Regional Director. Specifically, VSA alleged that Union representatives had conditioned a waiver of Union initiation fees upon a showing of pre-election support for the Union, thereby improperly inducing employees to vote for the Union. VSA further alleged that Union representatives and supporters had threatened employees, creating [591]*591an atmosphere of fear which inhibited “employees’ free choice when voting.”2 In YSA’s view, these and other incidents had “contaminated” the election process, making impossible a free and uneoerced election.
The Regional Director conducted an independent, confidential investigation of VSA’s allegations and then issued a report concluding that none of VSA’s allegations were sufficient to warrant setting the election aside. The report accordingly recommended that VSA’s objections be overruled. VSA filed timely objections to this report, arguing that the Regional Director erred when he “totally dismissed the affidavits of three Company witnesses who stated that the Union Business Agent told them there would be no initiation fee if the Union was elected, but there would be initiation fees if there was a second attempt to organize.” VSA also took issue with the Regional Director’s conclusion that VSA’s allegations, even if true, did not warrant invalidating the election. Finally, VSA argued that it had submitted evidence raising material issues of fact sufficient to warrant an evidentiary hearing.
In April 1992, the Board formally adopted the Regional Director’s findings and certified the Union as the exclusive bargaining representative of employees in the designated unit at VSA. Following certification, VSA refused to bargain with the Union. As a result, the Union filed an unfair labor practice charge against VSA, which prompted the issuance of a complaint and notice of hearing alleging that VSA had violated Sections 8(a)(5) and 8(a)(1)3 of the National Labor Relations Act (“NLRA”) by refusing to bargain with the Union. VSA filed an answer admitting in part and denying in part the allegations, as well as asserting that the Board’s certification of the Union had been improper.
In December 1992, the Board issued a Decision and Order, inter alia, concluding that VSA had violated Sections 8(a)(1) and 8(a)(5) of the NLRA through its refusal to bargain with the Union.4 Accordingly, the Decision and Order required VSA to cease and desist from interfering with, restraining, or coercing employees in the exercise of their statutory rights, and further required VSA to bargain with the Union, to embody any understanding or agreement reached during bargaining in a signed agreement, and to post a remedial notice. In May 1993 the Board’s General Counsel filed an application for enforcement of the Board’s Order. VSA contested the application on the grounds that the Board’s decision (1) ignored “critical evidence,” (2) incorrectly resolved material issues and (3) contravened settled precedent. The Board rejected these contentions, and now seeks judicial enforcement of its Order.
II.
The standards for judicial review of Board-certified elections are well-settled. To begin with, the results of a Board-supervised representation election are presumptively valid. N.L.R.B. v. Columbia Cable T.V. Co., 856 F.2d 636, 638 (4th Cir.1988). This is not an insubstantial presumption; it can be overcome only by presentation of “specific evidence not only that the alleged acts of interference occurred but also that such acts sufficiently inhibited the free choice of employees as to affect materially the results of the [592]*592election.” Id. at 688, quoting N.L.R.B. v. Hydrotherm, Inc., 824 F.2d 332, 334 (4th Cir.1987). And the burden is on VSA, as the objecting party, to show that the challenged activity prejudiced the outcome of the election. See N.L.R.B. v. Manufacturer’s Packaging Company, Inc., 645 F.2d 223, 225 (4th Cir.1981); N.L.R.B. v. Bata Shoe Co., 377 F.2d 821, 826 (4th Cir.), cert. denied, 389 U.S. 917, 88 S.Ct. 238, 19 L.Ed.2d 265 (1967); see also N.L.R.B. v. Mattison Machine Works, 365 U.S. 123, 124, 81 S.Ct. 434, 435, 5 L.Ed.2d 455 (1961). Significantly, if the Board’s certification decision is reasonable and based on substantial evidence in the record as a whole, then our inquiry is at an end. Hydrotherm, 824 F.2d at 334, quoting N.L.R.B. v. Klingler Electric Corp., 656 F.2d 76, 85 (5th Cir.1981); see also Universal Camera Corp. v. N.L.R.B., 340 U.S. 474, 71 S.Ct. 456, 95 L.Ed. 456 (1951). Given this rigorous standard, courts appropriately proceed with “judicial caution” before overturning a representation election. See, e.g., Columbia Cable T.V., 856 F.2d at 639; N.L.R.B. v. A J. Tower Co., 329 U.S. 324, 330, 67 S.Ct. 324, 327-28, 91 L.Ed. 322 (1946) (The Board enjoys “a wide degree of discretion in establishing the procedure and safeguards necessary to insure the fair and free choice of bargaining representatives by employees”). Accordingly, we review the Board’s certification Order under an abuse of discretion standard. See Hydrotherm, 824 F.2d at 334; Manufacturer’s Packaging Co., 645 F.2d at 226 (The Board’s determination regarding the validity of an election “is within the sound discretion of the Board” and “should be reversed only when [the Board] has abused its discretion”).
III.
VSA’s primary objection to enforcement of the Board’s Order is that the Regional Director erroneously concluded that statements made during the election campaign concerning a waiver of Union initiation fees did not warrant vacating the election. To support its allegations, VSA submitted affidavits from three VSA employees indicating that R.W. Brown, a Union Business Agent, told employees at several pre-election meetings that initiation fees would be waived if the Union won election as the employees’ representative at the November 22, 1991 election, but that if the Union did not win the election and another petition for representation was filed a “year and a day” later, everyone would be charged initiation fees.5
These facts, VSA argues, are analogous to those in N.L.R.B. v. Savair Manufacturing Co., 414 U.S. 270, 94 S.Ct. 495, 38 L.Ed.2d 495 (1973), where the Supreme Court held that a waiver of initiation fees conditioned upon the signing of union authorization cards prior to a representation election is improper and will result in the setting aside of a union victory. Savair, 414 U.S. at 276-81, 94 S.Ct. at 498-501.6 It follows, according to VSA, that Savair compels the conclusion that the election here in issue should be set aside. This argument, while superficially appealing, ultimately fails because Savair, closely examined, is factually distinguishable from this case in a way that points persuasively in this case to upholding, rather than setting aside, the election.
In Savair, “recognition slips” were circulated among employees prior to the representation election. Savair, 414 U.S. at 272, 94 S.Ct. at 496. Any employee who signed a slip prior to the election automatically became a member of the union, and did not have to pay an “initiation fee” or “fine.” Id. at 272-73, 94 S.Ct. at 496-97. If an employee did not sign a slip and the union subsequently won the election, the employee would have to pay an initiation fee. Id. at 273, 94 S.Ct. at 497. While union officials did not conduct the solicitation of “recognition” slips, the officials did explain to employees that initiation fees would be waived only for those employees who signed the slips prior to the election. Id. at 274, 94 S.Ct. at 497-98. Finally, at least one employee testified that [593]*593he signed a “recognition slip” specifically to avoid a “fine” if the union won the election. Id. at 275, 94 S.Ct. at 498. On these facts the Supreme Court concluded that “[b]y permitting the union to offer to waive an initiation fee for those employees signing a recognition slip prior to the election, the Board allows the union to buy endorsements and paint a false portrait of employee support during its election campaign.” Savair, 414 U.S. at 277, 94 S.Ct. at 499. Thus, the linchpin of Savair is the linkage between the offer to waive the initiation fee and a pre-election commitment to support the union. See Savair, 414 U.S. at 275-78, 94 S.Ct. at 498-99. It is this linkage that constitutes the union’s impermissible interference in the election, and allows the union “to buy endorsements and paint a false portrait” of employee sentiment. Id. at 277, 94 S.Ct. at 499.
To the same effect is Deming Div., Crane Co., 225 NLRB 657, 1976 WL 7278 (1976), also relied on by VSA. In Deming, the union mailed a two page document to all employees in the potential bargaining unit indicating that “[T]here will be no initiation fees for anyone joining now during this campaign.... Sign the card! Do it now! Let’s get rolling.” Deming, 225 NLRB at 659, 1976 WL 7278. Deming is Savair’s factual twin: in both, the initiation fee waiver was open only to those employees who signed union support cards prior to the election.7 Thus, in Deming, as in Savair, the waiver offer was an impermissible interference in the election because, in order to benefit from the waiver, employees had to pledge pre-election union support.8
No such impermissible interference by the union occurred here. Unlike Savair and Deming, the offer to waive initiation fees here was not conditioned on a pre-election commitment to support or vote for the Union. On the contrary, everyone qualified for the waiver if the Union won the election, even those who opposed the Union. Similarly, in the event that the Union initially lost the election, everyone would be subject to initiation fees if the Union won a subsequent election, even those who supported the Union.9
VSA also misconstrues Deming and Savair as condemning any initiation fee waiver linked to the outcome of a particular election. Specifically, VSA contends that the waiver offer “applied only to this campaign,” and was “directly related to a favorable vote in the election.” This is true; the fee waiver in issue was directly related to a Union victory.10 But this is not what Savair and Deming forbid: what is forbidden in Savair and Deming is a linkage between the waiver of initiation fees and, as did not occur here, preelection commitment by employees to vote [594]*594for the Union. Similarly, Savair and Deming also forbid linking a fee waiver for a particular employee to that employee’s individual vote. Thus, a waiver offer made to employees voting in favor of a union and not to those voting against the union is imper-missibly related to an employee’s “yes or no” vote. See Molded Acoustical Products, Inc., 815 F.2d at 938-39.11 Here, the Board found no evidence that the waiver offer was limited to those employees who voted for the Union. Rather, as the Board concluded, the Union made an across-the-board waiver offer that applied equally to all employees, regardless of how they actually voted or whether they made a pre-election commitment to support the Union. As such, the Union’s waiver offer is a permissible campaign tactic that does not run afoul of Savair and Doming.
Indeed, as Savair and Deming make clear, not every union offer to waive initiation fees is impermissible. Thus Savair indicates, in dicta, that union interests may be legitimately served by offering an across-the-board waiver to all employees, regardless of whether employees show pre-election union support. Savair, 414 U.S. at 272-74, 94 S.Ct. at 496-98.12 The Board in Deming went further and noted that unions may permissibly offer to waive initiation fees in the course of an election provided:
(1) the waiver is unconnected with support for the union before the election
(2) the waiver is unrelated to a vote in the election
(3)the waiver is made without distinction between joining the union before or after the election.
Deming Div., 225 NLRB at 659, 1976 WL 7278 (citing Savair). Various circuits, including this circuit, have adopted this interpretation of Savair and have consistently held that a union does not endanger the free exercise of employee choice if it does not condition its initiation fee policy on pre-election union support, but rather offers an across-the-board fee waiver to all employees, regardless of pre-election union support. See, e.g., N.L.R.B. v. Hydrotherm, Inc., 824 F.2d 332, 336 (4th Cir.1987).13 Thus this circuit and the Supreme Court, as well as various other circuits, have indicated that the crucial distinction in determining whether a proposed waiver of initiation fees is a permissible union tactic is between waiver offers made across the-board to all employees regardless of pre-election union support, and waiver offers made only to those employees who manifest pre-election union support or who voted for the Union. The former offers are permissible, the latter are not.
Yet, VSA seemingly argues that the Union’s promise to waive initiation fees, even if across-the-board, had an impermissibly coercive effect. This is not so, for while any offer to waive initiation fees is an inducement, this inducement does not amount to impermissible coercion in the absence of a linkage between the offer and either a preelection pledge of union support or an actual [595]*595vote for the union.14 The fact is that most permissible union and management tactics are inducements designed to persuade or pressure employees to vote for one side or the other. And there is sometimes a fine line between permissible and impermissible inducements or conduct. For example, it is impermissibly coercive for rank and file employees to make intimidating statements to non-union employees as the non-union employees vote in a union representation election. See Kitchen Fresh, Inc. v. N.L.R.B., 716 F.2d 351, 359 (6th Cir.1983). At the same time, the congregation of union supporters, wearing union insignia, near polls for the purpose of urging voters to “protect their jobs with a vote for the union,” does not “interfere with the voter’s exercise of free choice to such an extent that the conduct materially affected the results of the election,” even though such behavior is arguably intimidating. Colquest Energy, Inc., v. N.L.R.B., 965 F.2d 116, 120 (6th Cir.1992). Further, a union is free to promise employees a benefit established for union members, such as free legal representation, provided receipt of the benefit is not conditioned on the employee’s demonstration of pre-election union support. Colquest Energy, 965 F.2d at 121.15 Yet, an employer may be constrained from matching the union’s promise.16 Thus the Board and reviewing courts must discern the line between assuring a fair election, and not unduly restricting the campaign actions of either unions or management.
Of course, the primary goal of the Board in regulating representation campaigns, and of courts on review, is ensuring that the election process is as fair and free from impermissible inducements as possible. Yet, while the Board “aspires to ‘laboratory conditions’ in elections,” it is clear that “clinical asepsis is an unattainable goal in the real world of union organizational efforts.” N.L.R.B. v. Sumter Plywood Corp., 535 F.2d 917, 920 (5th Cir.1976), cert. denied, 429 U.S. 1092, 97 S.Ct. 1105, 51 L.Ed.2d 538 (1977).17 Indeed, “exaggerations, hyperbole, and appeals to emotions are the stuff of which election campaigns are made.” Schneider Mills, Inc., v. N.L.R.B., 390 F.2d 375, 379 (4th Cir.1968) (en banc). And while “[c]oer-eive conduct is never condoned during the election process ... the Board will not set aside an election unless an atmosphere of fear and coercion rendered free choice impossible.” N.L.R.B. v. Herbert Halperin Distrib. Corp., 826 F.2d 287, 290 (4th Cir. 1987). To accept VSA’s argument that the Union’s across-the-board fee waiver offer was impermissibly coercive would be to condemn any union campaign tactic that involves any element of pressure or inducement. Settled authority is sensibly to the contrary, otherwise no election would survive scrutiny. See Sumter Plywood, 535 F.2d at 920 (“Some degree of puffing and propagandizing must be permitted, else the laboratory would be found infected in every case.”). Rather, it is the degree of pressure or inducement that is crucial in determining whether a representation campaign is valid, or must be set aside. And in order for such pressure or inducement to warrant setting aside an election, it must lead to the “failure of those in the bargaining unit to make their collective desires effective.” Ovemite Transportation Company v. N.L.R.B., 327 F.2d 36, 41 (4th Cir.1963). And in the case at bar, YSA has failed to show that the Union’s waiver offer led to the inability of those VSA employees in the designated bargaining unit to “make their collective desires effective.”
[596]*596IV.
But the analysis does not end with the conclusion that unconditional and across-the-board offers to waive union initiation fees are a permissible union campaign tactic. VSA does not concede that the Union’s fee waiver offer here was unconditional; rather, it attacks the Regional Director’s and Board’s factual conclusion that the offer was in fact across-the-board and unconditional. The substantial evidence rule spikes this attack, for there is ample record evidence to support the Regional Director’s and Board’s conclusion.
To begin with, as the Regional Director pointed out, a leaflet mailed by the Union to VSA employees prior to the election, entitled “What You Should Know About the Teamsters Union,” clearly indicated that “there would be no initiation fees without any distinction between those signing cards before or after the election.”18 The Regional Director further correctly concluded that the Union Agent’s remarks “did not state either implicitly or explicitly that anyone would be required to pay initiation fees after the Union won the election.” And the Regional Director further found, based on the statements and evidence presented by VSA, that the Union did not impermissibly indicate that the waiver offer would terminate prior to the representation election, see Cataract, Inc., 274 NLRB 741,1985 WL 45853 (1985); Coleman Company, 212 NLRB at 227-28, 1974 WL 11397, but merely indicated that the offer would not apply to any future election.19 VSA, in short, did not show that the Union’s pre-election waiver offer operated to prevent employees from making their collective desires known. See Columbia Cable. TV, 856 F.2d at 638, quoting Hydrotherm, 824 F.2d at 334.
VSA contends that the leaflet language, as well as the statements made by Union Agent Brown, were ambiguous, such that the language and statements might reasonably have been construed by VSA employees to mean that the waiver offer was conditioned on either a showing of pre-election Union support or an actual vote for the Union. It is true that ambiguous waiver offers are to be interpreted against the offer- or. See N.L.R.B. v. Semco Printing Ctr., Inc., 721 F.2d 886, 889 (2d Cir.1983) (“[W]aiver offers, the language of which is ambiguous concerning “critical details” — in particular the date until which the offer remains open — violate Savair, notwithstanding how employees may actually construe those offers.”). Yet, substantial evidence in the record as a whole supports the conclusion of the Regional Director and the Board that the Union’s offer was not ambiguous, but clearly indicated that there was no linkage between a showing of pre-election Union support and a waiver of initiation fees. Accordingly, the Board did not abuse its discretion in concluding that the Union’s fee waiver offer did not warrant invalidating the election.
V.
VSA next argues that it was entitled to an evidentiary hearing before the Board certified the representation election. Pre-certification evidentiary hearings are necessary only if there are substantial and material issues of fact relating to the validity of the election. Columbia Cable TV Co., 856 F.2d at 639; see N.L.R.B. v. Hydrotherm, 824 F.2d 332, 335 (4th Cir.1987); N.L.R.B. v. Bata Shoe Co., 377 F.2d 821, 825 (4th Cir.), [597]*597cert. denied, 389 U.S. 917, 88 S.Ct. 238, 19 L.Ed.2d 265 (1967). Yet, an employer is not required to present evidence that presumptively establishes that its objections must be sustained before it can obtain an evidentiary hearing. N.L.R.B. v. J-Wood/A Tappan Din, 720 F.2d 309, 315 (3rd Cir.1983).20 And significantly, the allegations of the objecting party must be taken as true in determining whether or not “substantial and material factual issues” exist. Anchor Inns, Inc., v. N.L.R.B., 644 F.2d 292, 297 (3rd Cir.1981). “Once the right to a hearing is established, the investigation is not a substitute for it.” Anchor Inns, 644 F.2d at 297, quoting N.L.R.B. v. Claxton Mfg. Co., 613 F.2d 1364, 1366 (5th Cir.1980), modified 618 F.2d 396 (5th Cir.1980). These principles, applied here, confirm that the Regional Director and Board correctly determined that no pre-certi-fication evidentiary hearing was required.
VSA contends there were several genuine issues of material fact, including the waiver of initiation fees, that mandated the holding of an evidentiary hearing. Ultimately, VSA’s objections regarding the evidentiary hearing fail. VSA submitted, and the Regional Director properly accepted as true, affidavits from VSA employees stating that Union Agent Brown made a pre-election offer to waive initiation fees. See, e.g., N.L.R.B. v. Manufacturer’s Packaging, 645 F.2d 223, 226 n. 1 (4th Cir.1981), quoting Bata Shoe, 377 F.2d at 826 (An evidentiary hearing is not required when, “if all the facts supporting the position of the objecting party were credited, no ground is shown for setting aside the election.”). Only after considering the evidence submitted by both VSA and the Union did the Regional Director conclude that the evidence proffered by VSA did not warrant either invalidating the election or granting VSA an evidentiary hearing.21 And VSA, as the objecting party, failed to offer any other evidence “which prima facie would warrant setting aside” the election.” Bata Shoe, 377 F.2d at 825; see ARA Services, Inc., v. N.L.R.B., 712 F.2d 936, 937 (4th Cir.1983). Accordingly, the Board’s determination that [598]*598the fee waiver at issue here did not imper-missibly coerce employees into supporting the Union was not unreasonable, was supported by the substantial record evidence, and therefore was not an abuse of discretion.22
Essentially, then, VSA takes issue not with the legal principles applied by the Regional Director and the Board, but merely with the factual conclusions reached. We have repeatedly emphasized that a party’s disagreement with the interpretation or inferences placed on facts by the Regional Director is simply not sufficient to warrant an evidentia-ry hearing. Methodist Home v. N.L.R.B., 596 F.2d 1173, 1178 (4th Cir.1979); see also Intertype Co. v. N.L.R.B., 401 F.2d 41, 44 (4th Cir.1968), cert. denied, 393 U.S. 1049, 89 S.Ct. 686, 21 L.Ed.2d 691 (1969). (“[T]o insist that the Board conduct a plenary hearing for every objection raised during representation proceedings would, by encouraging dissatisfied parties to engage in this dilatory tactic, prevent the prompt disposition of election cases.”). In sum, the Board did not abuse its discretion in determining that the Union’s offer to waive initiation fees was not impermissible under the Savair principle, that the evidence presented by VSA did not warrant setting aside the election, and accordingly that an evidentiary hearing was not required.
The Board’s Order will be enforced.
ENFORCEMENT GRANTED