He was the defendant/appellee for the federal government of the United States in Buckley v. Valeo, 424 U.S. 1 (1976), in which the Supreme Court of the United States upheld federal limits on and disclosure requirements for campaign contributions but struck down limits on campaign and independent expenditures.
He was the plaintiff/appellant for the federal government in Buckley v. Valeo, 424 U.S. 1 (1976), which resulted in the Supreme Court upholding federal caps and disclosure requirements for campaign financing but striking down restrictions on campaign and outside expenditures.