OCTOBER TERM, 1975 Per Curiam 424 U.S. effective modes of communication.2 0 Although the Act's limitations on expenditures by campaign organizations and political parties provide substantially greater room for discussion and debate, they would have required restrictions in the scope of a number of past congressional and Presidential campaigns 21 and would operate to constrain campaigning by candidates who raise sums in excess of the spending ceiling. By contrast with a limitation upon expenditures for political expression, a limitation upon the amount that any one person or group may contribute to a candidate or political committee entails only a marginal restriction upon the contributor's ability to engage in free com20 The record indicates that, as of January 1, 1975, one full-page advertisement in a daily edition of a certain metropolitan newspaper cost $6,971.04-almost seven times the annual limit on expenditures "relative to" a particular candidate imposed on the vast majority of individual citizens and associations by § 608 (e) (1). 21 The statistical findings of fact agreed to by the parties in the District Court indicate that 17 of 65 major-party senatorial candidates in 1974 spent more than the combined primary-election, general-election, and fundraising limitations imposed by the Act. §§ 591 (f)(4)(H), 608 (c)(1)(C), (D). The 1972 senatorial figures showed that 18 of 66 major-party candidates exceeded the Act's limitations. This figure may substantially underestimate the number of candidates who exceeded the limits provided in the Act, since the Act imposes separate ceilings for the primary election, the general election, and fundraising, and does not permit the limits to be aggregated. § 608 (c) (3). The data for House of Representatives elections are also skewed, since statistics reflect a combined $168,000 limit instead of separate $70,000 ceilings for primary and general elections with up to an additional 20% permitted for fundraising. §§ 591 (f) (4) (H), 608 (c) (1) (E). Only 22 of the 810 major-party House candidates in 1974 and 20 of the 816 major-party candidates in 1972 exceeded the $168,000 figure. Both Presidential candidates in 1972 spent in excess of the combined Presidential expenditure ceilings. §§ 608 (c)(1)(A), (B).

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