Tonight on The Last Word: Another House GOP hearing to help Donald Trump falls flat. Also, ProPublica reports that Justice Alito took an undisclosed luxury vacation with a GOP billionaire who later had cases before the Supreme Court. And Rep. Lisa Blunt Rochester launches her Senate run in Delaware. Rep. Eric Swalwell, Andrew Weissmann, Sen. Sheldon Whitehouse and Rep. Lisa Blunt Rochester join Lawrence O'Donnell.