Lawrence: Trump humiliates Elon Musk by telling House GOP, ‘Elon won’t go home.’

Tonight on The Last Word: Donald Trump’s team is reportedly growing tired of Elon Musk. Also, GOP lawmakers express confusion over Trump’s defense secretary selection. And Jack Smith and his team plan to resign before Trump’s inauguration. Sen. Tammy Baldwin, Rep. Adam Smith, and Andrew Weissmann join Lawrence O’Donnell.