MSNBC's Ari Melber hosts "The Beat" on Monday, May 13, and reports on Michael Cohen's testimony in Donald Trump's criminal trial. Kristy Greenberg, Molly Jong-Fast, Maya Wiley and Duncan Levin join.

MSNBC's Ari Melber hosts "The Beat" on Wednesday, May 15, and reports on the upcoming Biden-Trump presidential debate, Donald Trump's criminal trial, and backlash to House Speaker Mike Johnson's appearance in Trump's courtroom. Plus, Chai Komanduri and Baron Davis join for the latest "Fallback" installment. Kristy Greenberg, Joe Trippi, and Mark McKinnon also join.