William Taylor and Billy Florence appeal their jury convictions for participating in a strike against the federal government in violation of 18 U.S.C. Sec. 1918(3). We affirm.

Taylor and Florence were president and vice president, respectively, of the Professional Air Traffic Controllers Organization (PATCO) Local 572. They were employed by the Federal Aviation Administration as air traffic controllers in Tucson, Arizona. On August 3, 1981, the national president of PATCO announced a nationwide strike. Of the forty-one Tucson air traffic controllers who failed to report to work during the strike, only Taylor and Florence were prosecuted. On August 4, 1981, the government issued criminal complaints against them. On August 25, a grand jury returned indictments charging Taylor with striking on August 8 and Florence with striking on August 3. The cases were consolidated for trial.

Defendants moved to dismiss the indictments because of infirmities in the charging statute and on the grounds of selective prosecution. The district court denied the motions and defendants proceeded to trial. After the jury returned guilty verdicts, the judge suspended imposition of sentence and placed defendants on one year's probation.

On appeal, Taylor and Florence contend that the district court erred in refusing to dismiss the indictments. They also allege numerous errors at their trial. None of their contentions requires reversal.

Defendants moved to dismiss the indictments on the ground that the charging statute, 18 U.S.C. Sec. 1918(3), prohibiting strikes against the federal government, is unenforceable because a portion of its defining statute, 5 U.S.C. Sec. 7311(3), dealing with assertion of the right to strike, has been found unconstitutional. The district court properly denied the motion.

Under 5 U.S.C. Sec. 7311(3), a person may not hold or accept employment with the federal government if he "participates in a strike, or asserts the right to strike" against the federal government. Section 1918(3) of title 18 renders this conduct criminal:

Whoever violates the provisions of section 7311 of title 5 that an individual may not accept or hold [federal employment] if he--

....

(3) participates in a strike, or asserts the right to strike, against the [federal government] ...

....

shall be fined not more than $1,000 or imprisoned not more than one year and a day, or both.

Appellants contend that the clause in 5 U.S.C. Sec. 7311(3) concerning assertion of the right to strike is unconstitutional. National Association of Letter Carriers v. Blount, 305 F. Supp. 546 (D.D.C.1969), appeal dismissed, 400 U.S. 801, 91 S. Ct. 7, 27 L. Ed. 2d 33 (1970). They argue that this unconstitutional portion cannot be severed from the accompanying clause dealing with participation in a strike and that the whole statute therefore must fall. They further contend that since Sec. 1918 depends on Sec. 7311 for its definitions, it is meaningless and unenforceable against them.

We agree that assertion of the right to strike is protected by the First Amendment. We do not agree, however, that 5 U.S.C. Sec. 7311 or 18 U.S.C. Sec. 1918 is thereby rendered totally invalid. The Supreme Court has affirmed summarily a decision upholding the constitutionality of 18 U.S.C. Sec. 1918(3) insofar as it prohibits strikes against the federal government. United Federation of Postal Clerks v. Blount, 325 F. Supp. 879 (D.D.C.), aff'd mem., 404 U.S. 802, 92 S. Ct. 80, 30 L. Ed. 2d 38 (1971). The court in United Federation of Postal Clerks expressly noted that the portion of 18 U.S.C. Sec. 1918(3) inhibiting assertion of the right to strike was invalid. Id. at 881. Nevertheless, the court severed this part by implication and upheld the prohibition against participation in strikes.

We too are satisfied that the statutes are severable. "Unless it is evident that the legislature would not have enacted those provisions which are within its power, independently of that which is not, the invalid part may be dropped if what is left is fully operative as law." United States v. Jackson, 390 U.S. 570, 585, 88 S. Ct. 1209, 1218, 20 L. Ed. 2d 138 (1968), quoting Champlin Refining Co. v. Commission, 286 U.S. 210, 234, 52 S. Ct. 559, 564, 76 L. Ed. 2d 1062 (1932). We find it quite unlikely that Congress would have chosen to discard the prohibition against participation in a strike if it could not have included the clause prohibiting assertion of the right to strike. See Jackson, 390 U.S. at 586, 88 S.Ct. at 1218; United States v. Hicks, 625 F.2d 216, 221 n. 10 (9th Cir.1980), rev'd on other grounds, 450 U.S. 1036, 101 S. Ct. 1752, 68 L. Ed. 2d 233 (1981). The legislative history evinces no contrary congressional intent.1

Once the offending clause is removed, the remainder is fully operative.2 The assertion of the right to strike is logically distinct from participation in a strike, and the clauses are in the disjunctive. We accordingly conclude that the prohibition against striking contained in 18 U.S.C. Sec. 1918(3) is valid and enforceable.

Taylor and Florence next moved to dismiss the indictments on the ground that 18 U.S.C. Sec. 1918 is void for vagueness. They argued that although Sec. 1918 requires a person to "hold a position" with the federal government before liability may attach, the statute is unclear as to who "holds a position." The district court ruled that the only reasonable interpretation of this provision is that a person "holds a position" with the federal government when he is currently a federal employee.3 We agree.

The wording of the statute is sufficient to give a person of ordinary intelligence fair notice that his or her contemplated conduct is forbidden.4 This is all the Constitution requires. Bouie v. City of Columbia, 378 U.S. 347, 351, 84 S. Ct. 1697, 1701, 12 L. Ed. 2d 894 (1964) quoting United States v. Harriss, 347 U.S. 612, 617, 74 S. Ct. 808, 811, 98 L. Ed. 989 (1954).

Taylor and Florence also moved to dismiss the indictments because of selective prosecution. They argued that the government deliberately targeted them for prosecution because they exercised their First Amendment rights to hold office, to engage actively in union affairs, and to make public statements on union activities. The district court denied the motion because the evidence adduced at a hearing on the issue did not demonstrate impermissible selective prosecution. Applying the "clearly erroneous" standard, United States v. Wilson, 639 F.2d 500, 503 (9th Cir.1981), we affirm the court's ruling.

The district court found that the government selected Taylor and Florence for prosecution only because they were the leaders of an illegal strike and their prosecution might deter others from striking. The record amply supports the finding that Taylor and Florence were actively engaged in organizing and leading the strike. Taylor testified that he had arranged with the national office at PATCO to notify every member of the local union of the strike and had designated a committee for preparation of picket signs and banners. He also set up picketing schedules and testified that Florence had assisted him in these activities. Before and during the strike, both men made numerous public statements in their representative capacities.

There is nothing constitutionally infirm in prosecuting leaders of an illegal strike. Indeed, it is quite rational to do so to enhance the deterrent effect of the enforcement procedure. See United States v. Ness, 652 F.2d 890, 892 (9th Cir.) (per curiam), cert. denied, --- U.S. ----, 102 S. Ct. 976, 71 L. Ed. 2d 113 (1981). It is also quite rational for the government, in deciding whether or not to prosecute, to consider whether the potential defendants have, by their public statements or otherwise, made clear their actual or intended participation in the illegal activity.5

Taylor and Florence were required to show that the government selected them from a larger group of non-prosecuted alleged violators6 because of their exercise of a constitutional right. Wilson, 639 F.2d at 503. The district court found that the evidence did not support defendants' contention and we cannot say this finding is clearly erroneous.

Taylor and Florence contend that an affidavit filed with the district court by the government establishes that they were selected for prosecution because of their union offices, rather than for their leadership of the illegal strike. The affidavit, filed by the Assistant United States Attorney who decided to prosecute them, states that because Taylor and Florence, as president and vice-president of the local PATCO union, were the "presumptive" leaders of the strike, it was believed that their prosecution would deter others from leading such illegal activity. We are unwilling to conclude, however, that the general and somewhat ambiguous language of this affidavit establishes as a matter of law that the government decided to prosecute defendants for their associational rather than for their strike-related activities. Other evidence produced at the hearing showed far more than "presumptive" leadership of the strike by Taylor and Florence. In light of all the evidence, the finding of the district court that defendants were not the victims of impermissible selective prosecution was not clearly erroneous. We therefore uphold it.

We find no merit in any of appellants' remaining contentions. First, the denial of their motion to continue the trial was not an abuse of discretion. The alleged prejudicial pre-trial publicity was not focused on the defendants but rather on PATCO's decertification in Washington, D.C. The district court's thorough voir dire was more than adequate to uncover any prejudice. See United States v. Flores-Elias, 650 F.2d 1149, 1151 (9th Cir.), cert. denied, 454 U.S. 904, 102 S. Ct. 412, 70 L. Ed. 2d 223 (1981).

Second, there was no abuse of discretion in denying defendants' motion to depose President Reagan and F.A.A. Administrator Helms. Taylor and Florence failed to make an adequate showing that the proposed testimony would be sufficiently favorable to the defense to warrant the depositions. See United States v. Trenary, 473 F.2d 680, 682 (9th Cir.1973).

Third, the district court properly exercised its discretion in refusing to admit into evidence public statements made by President Reagan. Defendants failed to make a proper showing that the evidence was admissible. Moreover, the President's statement on August 3, 1981 that if the air traffic controllers did not return to work within 48 hours, they would be terminated, cannot be construed as a promise of immunity from criminal prosecution.7 The President's statement of August 13, 1981 that "there is no strike" has no bearing on whether Taylor and Florence participated in a strike prior to that date.

Fourth, the district court did not abuse its discretion by allowing into evidence portions of the appointment affidavit executed by Taylor upon entering federal service. Prior to admitting the affidavit, those portions stating that Taylor would not assert the right to strike or belong to an organization asserting the right to strike were stricken. The remaining portion stating that Taylor would not participate in a strike was clearly admissible.

Fifth, the district court did not err in failing to instruct the jury that "striking" does not include quitting because of abnormally dangerous working conditions. The evidence defendants might have introduced to support such an instruction could come in only under the defenses of necessity or duress. See United States v. Lowe, 654 F.2d 562, 566-67 (9th Cir.1981) (necessity); United States v. Hernandez, 608 F.2d 741, 750 (9th Cir.1979) (duress). Prior to trial, the government made a motion to exclude evidence on these defenses. Defendants did not oppose the motion. It is not error to fail to give a requested instruction where the evidence to support that instruction has been excluded without objection.8

Sixth, there was no error in denying defendants' motion for acquittal based on insufficient evidence. There was ample evidence of a strike and of defendants' participation in it. A majority of employees, including defendants, did not report to work during the first week of the strike. Neither defendant offered any excuse for his failure to report to work and both defendants made public statements on August 5 which indicated the strike's existence and their participation in it. Viewing the evidence in a light most favorable to the government, there was sufficient evidence from which the jury could reasonably find defendants guilty beyond a reasonable doubt. United States v. Carrier, 654 F.2d 559, 561 (9th Cir.1981).

Accordingly, the convictions are AFFIRMED.