OCTOBER TERM, 1975 Per Curiam 424 U. S. tion ceilings is merely to require candidates and political committees to raise funds from a greater number of persons and to compel people who would otherwise contribute amounts greater than the statutory limits to expend such funds on direct political expression, rather than to reduce the total amount of money potentially available to promote political expression. The Act's contribution and expenditure limitations also impinge on protected associational freedoms. Making a contribution, like joining a political party, serves to affiliate a person with a candidate. In addition, it enables like-minded persons to pool their resources in furtherance of common political goals. The Act's contribution ceilings thus limit one important means of associating with a candidate or committee, but leave the contributor free to become a member of any political association and to assist personally in the association's efforts on behalf of candidates. And the Act's contribution limitations permit associations and candidates to aggregate large sums of money to promote effective advocacy. By contrast, the Act's $1,000 limitation on independent expenditures "relative to a clearly identified candidate" precludes most associations from effectively amplifying the voice of their adherents, the original basis for the recognition of First Amendment protection of the freedom of association. See NAACP v. Alabama, 357 U. S., at 460. The Act's constraints on the ability of independent associations and candidate campaign organizations to expend resources on political expression "is simultaneously an interference with the freedom of [their] adherents," Sweezy v. New Hampshire, 354 U. S. 234, 250 (1957) (plurality opinion). See Cousins v. Senator Charles Mathias, Jr., operated large-scale campaigns on contributions raised under a voluntarily imposed $100 contribution limitation.

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