54 CITIZENS UNITED v. FEDERAL ELECTION COMM’N Opinion of the Court tion and disclosure requirements on lobbyists, even though Congress has no power to ban lobbying itself. United States v. Harriss, 347 U. S. 612, 625 (1954) (Con gress “has merely provided for a modicum of information from those who for hire attempt to influence legislation or who collect or spend funds for that purpose”). For these reasons, we reject Citizens United’s contention that the disclosure requirements must be limited to speech that is the functional equivalent of express advocacy. Citizens United also disputes that an informational interest justifies the application of §201 to its ads, which only attempt to persuade viewers to see the film. Even if it disclosed the funding sources for the ads, Citizens United says, the information would not help viewers make informed choices in the political marketplace. This is similar to the argument rejected above with respect to disclaimers. Even if the ads only pertain to a commercial transaction, the public has an interest in knowing who is speaking about a candidate shortly before an election. Because the informational interest alone is sufficient to justify application of §201 to these ads, it is not necessary to consider the Government’s other asserted interests. Last, Citizens United argues that disclosure require ments can chill donations to an organization by exposing donors to retaliation. Some amici point to recent events in which donors to certain causes were blacklisted, threat ened, or otherwise targeted for retaliation. See Brief for Institute for Justice as Amicus Curiae 13–16; Brief for Alliance Defense Fund as Amicus Curiae 16–22. In McConnell, the Court recognized that §201 would be un constitutional as applied to an organization if there were a reasonable probability that the group’s members would face threats, harassment, or reprisals if their names were disclosed. 540 U. S., at 198. The examples cited by amici are cause for concern. Citizens United, however, has offered no evidence that its members may face similar

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