Senator Schumer: 'Sessions is in dereliction of his duty'
06:21Senator Chuck Schumer, top Senate Democrat, talks with Rachel Maddow about Trump officials making non-legal excuses for not answering questions from members of Congress in the Trump-Russian investigation.
Developments in three Mueller-related cases advance Trump scandal
20:56Manafort hid Russian intel-tied contacts, faces decades of prison
10:56Manafort lies related to Mueller probe's 'undisputed core': judge
04:55Two Trump attorneys accused of lying to federal ethics officials
02:24Trump undermines emergency declaration as soon as he makes it
07:18Emergency declaration could backfire, force Republican opposition
08:08
