Which supreme court case likened political spending to the first amendment, Buckley v. Valeo or Massachusetts v. Environmental Protection Agency?
Massachusetts v. Environmental Protection Agency: Massachusetts v. Environmental Protection Agency, 549 U.S. 497 (2007), is a 5-4 U.S. Supreme Court case in which twelve states and several cities of the United States brought suit against the Environmental Protection Agency (EPA) to force that federal agency to regulate carbon dioxide and other greenhouse gases (GHGs) as pollutants. Buckley v. Valeo: Buckley v. Valeo, 424 US 1 (1976) is a US constitutional law Supreme Court case on campaign finance. Buckley v. Valeo:  In a "per curiam" (by the Court) opinion, they ruled that expenditure limits contravene the First Amendment provision on freedom of speech because a restriction on spending for political communication necessarily reduces the quantity of expression.
Buckley v. Valeo