Mueller subpoenas mark big new step in Trump Russia investigation07:15
Carol Lee, NBC News national political reporter, talks with Ari Melber about Special Counsel Robert Mueller subpoenaing grand jury testimony from PR executives tied to Paul Manafort.
Developments in three Mueller-related cases advance Trump scandal20:56
Manafort hid Russian intel-tied contacts, faces decades of prison10:56
Manafort lies related to Mueller probe's 'undisputed core': judge04:55
Two Trump attorneys accused of lying to federal ethics officials02:24
Trump undermines emergency declaration as soon as he makes it07:18
Emergency declaration could backfire, force Republican opposition08:08