The Last Word with Lawrence O'Donnell 02/17/17

Campaigner-in-Chief Trump: The election is over – time to govern

President Trump hits the road this weekend with a rally in in Florida and he's already talking up "massive crowds." MSNBC's Ari Melber looks at whether campaign-mode Donald Trump will be able to do the hard work of governing. ... more Duration: {{video.duration.momentjs}}