On this week's episode of Beg to Differ, host Mona Charen is joined by regular panelists Bill Galston and Damon Linker, and by special guest Sarah Longwell, to discuss the first two impeachment inquiry hearings. Are there persuadables watching, if they even really exist? Plus, a discussion about the 2020 Democratic primaries, with new entrants Deval Patrick and Michael Bloomberg. Special Guests: Bill Galston, Damon Linker, and Sarah Longwell.