Lawrence: Elon Musk suffered a humiliating demotion by Donald Trump

Tonight on The Last Word: Donald Trump picks a Fox host to serve as defense secretary. Also, Trump allies push for Rick Scott as the Senate GOP leader. Plus, Senate Democrats race to confirm judges before the next Trump administration. And a former NASA official flips a GOP House seat in California. E.J. Dionne, Stuart Stevens, Sen. Amy Klobuchar, and Rep.-elect George Whitesides join Lawrence O’Donnell.