The supreme court just gutted another campaign finance law. Here’s what happened.

The Supreme Court on Wednesday released its decision in McCutcheon v. Federal Election Commission, the blockbuster money-in-politics case of the current term. The court's five conservative justices all agreed that the so-called aggregate limit on the amount of money a donor can give to candidates, political action committees, and political parties is unconstitutional. In a separate opinion, conservative justice Clarence Thomas went even further, calling on the court to overrule Buckley v. Valeo, the 1976 decision that concluded it was constitutional to limit contributions to candidates.