MSNBC's Ari Melber hosts "The Beat" on Tuesday, May 20, and reports on Trump under scrutiny for probing and indicting critics and for potentially accepting a multi-million dollar Qatari plane. Plus, James Carville on Elon Musk saying he'll spend less on politics, and the fight over the House GOP spending bill. James Carville, Jason Johnson and Emily Bazelon join.
