Answer: The correct answer is Citizen's United v. Federal Election
Explanation: In 2008, Citizen's United, a conservative group, tried to show a film about Hillary Clinton right before the Democratic primary election, to not only make her look bad, but to make her lose the election. The US Supreme Court got the case and ruled in favor of Citizen's United that corporations can contribute an unlimited amount of money to political organizations as long as they do not directly contribute to a party or candidate.