Things seem to be moving quickly now. It has been a remarkable few weeks in American history. Momentum is building toward uncovering the distasteful possibility that the targeting of a U.S. presidential campaign was actually a political operation, fostered at the highest levels of government, masquerading as an FBI counterintelligence investigation. Attorney General William Barr has signaled that his interest in examining the origins of the investigation into the Trump campaign extends beyond whether the FBI operated “by the book,” as former FBI Director James Comey asserts. Barr also wants to understand the role that the larger intelligence community, or...