Tonight on the Last Word: Trump attacks Democrats as the Senate impeachment trial looms. Also, Attorney General William Barr defends Trump’s executive authority amid impeachment. Plus, John Fea and John Harwood join Ayman to discuss how divided evangelicals are over Trump. A new report shows 91 profitable Fortune 500 companies paid zero federal income taxes in the first year of Trump’s tax cuts. And a Kentucky newspaper op-ed calls out Mitch McConnell for “violating” two constitutional oaths. Natasha Bertrand, Joyce Vance, Ron Klain, David Cay Johnston, Barbara McQuade, David Lurie, and Kent Greenfield also join Ayman Mohyeldin.