b'MSNBC\'s Ari Melber hosts "The Beat" on Thursday, January 25, and reports on Donald Trump taking the stand today in his defamation case, former Trump staffer Peter Navarro\'s sentencing, good news on the economy and the recent allegations against Fulton County District Attorney Fani Willis. Joyce Vance, John Flannery, and Ben Labolt join to discuss the politics. Plus, rapper Benny the Butcher and Reverend Al Sharpton join Melber in the latest "Fallback" installment.'