Tonight on The Last Word: A new filing by the Justice Department reveals Trump lawyers’ claims about the seized documents. Also, New Hampshire Senate candidates spar over abortion in their first debate. Plus, the media face election deniers and conspiracies in covering elections in the post-Trump era. And Obama White House Photographer Pete Souza releases a new book and discusses capturing history. Harry Litman, Andrew Weissmann, Sen. Maggie Hassan and Margaret Sullivan also join Lawrence O’Donnell.