OCTOBER TERM, 1975 Per Curiam 424 U. S. stitutional questions presented here go not to the basic power of Congress to legislate in this area, but to whether the specific legislation that Congress has enacted interferes with First Amendment freedoms or invidiously discriminates against nonincumbent candidates and minor parties in contravention of the Fifth Amendment. A. General Principles The Act's contribution and expenditure limitations operate in an area of the most fundamental First Amendment activities. Discussion of public issues and debate on the qualifications of candidates are integral to the operation of the system of government established by our Constitution. The First Amendment affords the broadest protection to such political expression in order "to assure [the] unfettered interchange of ideas for the bringing about of political and social changes desired by the people." Roth v. United States, 354 U. S. 476, 484 (1957). Although First Amendment protections are not confined to "the exposition of ideas," Winters v. New York, 333 U. S. 507, 510 (1948), "there is practically universal agreement that a major purpose of that Amendment was to protect the free discussion of governmental affairs, . . . of course includ[ing] discussions of candidates. ... " Mills v. Alabama, 384 U. S. 214, 218 (1966). This no more than reflects our "profound national commitment to the principle that debate on public issues should be uninhibited, robust, and wide-open," New York Times Co. v. Sullivan, 376 U. S. 254, 270 (1964). In a republic where the people are sovereign, the ability of the citizenry to make informed choices among candiClassic, 313 U. S. 299 (1941). The Court has also recognized broad congressional power to legislate in connection with the elections of the President and Vice President. Burroughs v. United States, 290 U. S. 534 (1934). See Part III, infra.

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