Tonight on The Last Word: The Supreme Court rules that Donald Trump can stay on the Colorado ballot. Also, former Trump executive Allen Weisselberg pleads guilty to perjury. Plus, Vice President Harris calls for an "immediate" six-week Gaza ceasefire. And Republicans block a Senate bill to protect nationwide access to IVF treatments. Laurence Tribe, Andrew Weissmann, David Rothkopf, and Rep. Lisa Blunt Rochester join Lawrence O'Donnell.