Bill Barr started his term as President Trump’s second attorney general maligned by the left and is ending it under attack from both sides. But the man is a class act who has consistently done the nation great service. Barr announced his resignation, with a departure date of Dec. 23, in a classy letter to the president. Barr has done all he can to ensure those who abused their power to harm first candidate and then President Trump will be held accountable. In October, he made John Durham, the former US attorney he’d tasked with investigating the origins of the...