Mueller says Manafort's lies violate plea deal. Here's why

Paul Manafort is in legal hot water once again, as prosecutors for special counsel Robert Mueller have accused him of breaking his plea agreement and lying both to them and to the FBI “on a variety of subject matters.” What does this new accusation mean for Manafort--and for Mueller’s Russia probe? Former federal prosecutor Renato Mariotti joins Judy Woodruff to interpret the news.