Lawrence: Trump is the 'lead witness' for media companies suing over his White House ban

Tonight on The Last Word: A federal judge could rule in the Trump media ban case at any time. Also, Sen. Susan Collins calls the bribery allegations a “partisan hit job.” Plus, Democrats introduce a bill to protect farmers from Donald Trump’s economy. And Republicans start to break with Trump on his war in Iran. Sen. Sheldon Whitehouse and Sen. Amy Klobuchar join Lawrence O’Donnell.