Question: Which supreme court case likened political spending to the first amendment, Buckley v. Valeo or Massachusetts v. Environmental Protection Agency?
Sentence (from "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.
Relevant evidence: Yes