Today, in a 5-4 decision, the Supreme Court “struck down limits on the total amount of money an individual may spend on political candidates as a violation of free speech rights.” Justice Stephen G. Breyer was one of the dissenters: “If Citizens United opened a door, today’s decision we fear will open a floodgate.”

+ Lawrence Lessig: “So the central question raised was this: Is a law limiting aggregate contributions a law designed to limit corruption?”

+ MoJo: The Supreme Court just gutted another campaign finance law. Here’s what happened.

+ FiveThirtyEight: A few data points on the Court’s donor limit decision.