President Trump has been labeled repeatedly as a Moscow agent by top Democrats and their intelligence officers, but in special counsel Robert Mueller’s report he comes up clean. An analysis by The Washington Times didn’t find one instance in which Mr. Mueller found that the businessman-candidate communicated with Russian government officials, was spying for Moscow or was being blackmailed. The lack of evidence is important. Attorney General William Barr has assigned U.S. Attorney John H. Durham to investigate how the FBI decided in July 2016 to open a counterintelligence probe into the Trump campaign — meaning in effect the president....