Tonight on The Last Word: The DC appeals court hears Trump immunity claims on Tuesday. Plus, President Biden responds to protestors calling for a ceasefire in Gaza. Also, President Biden calls out "loser" Trump and his lies. And GOP Rep. Elise Stefanik calls Jan. 6 defendants "hostages." Andrew Weissmann, Glenn Kirschner, David Blight, Eugene Robinson, and Rep. Ruben Gallego join Lawrence O'Donnell.