Both in front of the cameras and behind closed doors, Republican Sen. Mitt Romney (UT) has embraced the role of leader of the Senate resistance to the party line on impeachment witnesses — and some of his colleagues are making brutally clear how they feel about it. In a private lunch with fellow Senate Republicans Monday, the frequent critic of President Trump reportedly “made a strong pitch” for calling additional witnesses for the Senate trial, according to Politico’s sources. In addition to trying to convince fellow Republicans to defect behind the scenes, Romney is going public with his plea. “The...