MSNBC's Ari Melber hosts "The Beat" on Wednesday October 19 and reports on the midterms as many in the GOP are attempting to backtrack on their 2020 election lies and as Democrats tap heavy-hitters to campaign including Barack Obama and Bernie Sanders. Plus, Politico reporting that Trump signed court document that "knowingly included false voter fraud" information. Errin Haines, Karoun Demirjian, David Kelley join, as well as CPAC chair Matt Schlapp.