Tonight on the Last Word: Former Trump White House staffer Cassidy Hutchinson is reportedly cooperating with the Justice Department’s January 6 investigation. Also, Democrats press gunmakers on their role in U.S. gun deaths. Plus, families and survivors of shootings push for gun reform. And a new report finds the sanctions against Russia are crippling the Russian economy. Daniel Goldman, Michael Beschloss, Rep. Katie Porter, David Hogg, Jazmin Cazares, Jeffrey Sonnenfeld and Steven Tian join Lawrence O’Donnell.