Andrea Mitchell Reports 01/20/16

Sen. McCaskill: Impossible for Sanders to win

Hillary Clinton is now taking Bernie Sanders seriously. As concerns rise, Clinton supporters like Senator Claire McCaskill are warning that in states like hers a nominee that calls himself a Democratic Socialist will jeopardize the rest of the ticket. MSNBC’s Kasie Hunt talks to McCaskill about this. ... more Duration: {{video.duration.momentjs}}