Dem Rep: Mueller must testify 'immediately,' will be subpoenaed

14:13

Rep. David Cicilline, who serves on the Judiciary Committee, tells Ari Melber that Bob Mueller needs to testify “immediately.” When pressed by Melber, the Congressman says if Mueller “doesn't come voluntarily” then he has “every confidence the chairman will issue the subpoena.” This revelation comes as more Trump aides defy subpoenas and a growing number of lawmakers are pushing for impeachment hearings.