President Biden and Donald Trump agree to debate in June and September. Also, Maryland Democrats back Angela Alsobrooks in the Senate race. Plus, Sen. Jon Tester vies for a fourth term in Montana. And Luke Russert discusses his book, "Look For Me There: Grieving My Father, Finding Myself." Andrew Weissmann, Simon Rosenberg, Angela Alsobrooks, and Sen. Jon Tester also join Lawrence O'Donnell.

Tonight on The Last Word: A GOP-led House Oversight Committee hearing descends into chaos. Also, Donald Trump continues to spread lies about his criminal cases. Plus, Democrats call on Justice Alito to recuse himself from January 6 cases. And the Dow closes above 40,000 for the first time in history. Rep. Jasmine Crockett, Stuart Stevens, Joyce Vance, Rep. Eric Swalwell, and Robert Reich join Ali Velshi.