On Friday's PBS NewsHour, liberal pundit Mark Shields ripped Attorney General William Barr for ruining his own legacy by being the president's "in-house lawyer," but he wanted a more stinging insult. He suggested he was "Donald Trump's Roy Cohn," a lawyer hated by liberals for prosecuting Soviet agents like Julius and Ethel Rosenberg in the Cold War years. Shields pretended the whole time that Republicans sullied the Justice Department with partisanship, and under the Democrats, it was practically perfect in every political way.