The Last Word with Lawrence O'Donnell 01/12/18

Trump denies it, but a senator confirms Trump said 'sh*thole'

Trump denies calling African nations 'sh*tholes,' but two senators in the room confirm. Plus, a White House MLK Jr. Day event makes an interesting backdrop for tough questions about race. Haitian-born lawyer Sam Jean, Nancy Giles, & Mark Thompson join Ali Velshi. ... more Duration: {{video.duration.momentjs}}