Jack Smith's new breakthrough in coup case

The Beat with Ari Melber - A podcast by Ari Melber, MSNBC

MSNBC's Ari Melber hosts "The Beat" on Tuesday, December 12, and reports on Donald Trump's trials. Plus, Billionaire Leon Cooperman joins for the latest "Summit Series" installment. David Kelley and David Plouffee also join.