The Last Word with Lawrence O'Donnell 10/27/15

Trump on dip in polls: 'I don’t get it'

Donald Trump was in Iowa on Tuesday begging supporters to get his poll numbers up, after at least one national poll shows him trailing Ben Carson. Lawrence talks with Maria Teresa Kumar, Joy Reid, Austan Goolsbee and Republican strategist Matt Schlapp for more. ... more Duration: {{video.duration.momentjs}}