MSNBC's Ari Melber hosts "The Beat" on Friday, March 24, and reports on Donald Trump’s legal fights, MAGA’s violent extremists, book bans, and Obamacare. Plus, Melber is joined by Posdnuos and Maseo of the iconic Hip Hop group De La Soul. Michael Beshloss, Joyce Vance, and David Kelley also join.