As testimonies begin in the impeachment hearing, Republicans are arguing that this inquiry will only harm the nation. Homeland Security Committee Chair Sen. Ron Johnson (R-Wis.) says that this will damage the country and erode executive privilege. Foreign Relations Committee member Sen. Chris Murphy (D-Conn.) explains why these hearings are necessary. Also, former Massachusetts Governor Deval Patrick talks about why his late entrance in the crowded Democratic field makes sense. Peggy Noonan, Eugene Robinson, Jeff Mason and Danielle Pletka join the Meet the Press round table.