Demonstrators gather outside the Supreme Court in Washington, Tuesday, Oct. 8, 2013, as the court heard arguments on campaign finance. The Supreme Court is tackling a challenge to limits on contributions by the biggest individual donors to political campaigns. The case being argued at the high court Tuesday is a test of the Roberts court's readiness to take its most aggressive swipe at campaign finance laws since its Citizens United decision in 2010 took the lid off independent spending by corporations and labor unions. (AP Photo/Susan Walsh)
