22 CITIZENS UNITED v. FEDERAL ELECTION COMM’N Opinion of the Court or affiliated committees to whom expenditures aggre gating over $200 have been made; persons to whom loan repayments or refunds have been made; the total sum of all contributions, operating expenses, out standing debts and obligations, and the settlement terms of the retirement of any debt or obligation.’ ” 540 U. S., at 331–332 (quoting MCFL, supra, at 253– 254). PACs have to comply with these regulations just to speak. This might explain why fewer than 2,000 of the millions of corporations in this country have PACs. See Brief for Seven Former Chairmen of FEC et al. as Amici Curiae 11 (citing FEC, Summary of PAC Activity 1990–2006, online at http://www.fec.gov/press/press2007/ 20071009pac/sumhistory.pdf); IRS, Statistics of Income: 2006, Corporation Income Tax Returns 2 (2009) (hereinaf ter Statistics of Income) (5.8 million for-profit corporations filed 2006 tax returns). PACs, furthermore, must exist before they can speak. Given the onerous restrictions, a corporation may not be able to establish a PAC in time to make its views known regarding candidates and issues in a current campaign. Section 441b’s prohibition on corporate independent expenditures is thus a ban on speech. As a “restriction on the amount of money a person or group can spend on political communication during a campaign,” that statute “necessarily reduces the quantity of expression by restrict ing the number of issues discussed, the depth of their exploration, and the size of the audience reached.” Buck ley v. Valeo, 424 U. S. 1, 19 (1976) (per curiam). Were the Court to uphold these restrictions, the Government could repress speech by silencing certain voices at any of the various points in the speech process. See McConnell, supra, at 251 (opinion of SCALIA, J.) (Government could repress speech by “attacking all levels of the production

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