John Bolton has something to say on impeachment

Ambassador John Bolton shocked the world today. The former National Security Advisor, who reportedly described the Trump administration's efforts to pressure Ukraine as a 'drug deal,' announced that he was willing to testify at the upcoming Senate trial if he's subpoenaed. What might he reveal? And why is he speaking out now? Plus, will the GOP outmaneuver Speaker Nancy Pelosi as she continues to refuse to transmit the articles of impeachment? CNN political director David Chalian dives into the latest headlines with CNN senior writer Zach Wolf and CNN political commentator Alice Stewart.