HOUSE OVERSIGHT 021111 The bureau already has some explaining to do. Thanks to the Washington Post's unnamed law-enforcement leakers, we know Mr. Nunes's request deals with a "top secret intelligence source" of the FBI and CIA, who is a U.S. citizen and who was involved in the Russia collusion probe. When government agencies refer to sources, they mean people who appear to be average citizens but use their profession or contacts to spy for the agency. Ergo, we might take this to mean that the FBI secretly had a person on the payroll who used his or her non-FBI credentials to interact in some capacity with the Trump campaign. This would amount to spying, and it is hugely disconcerting. It would also be a major escalation from the electronic surveillance we already knew about, which was bad enough. Obama political appointees rampantly "unmasked" Trump campaign officials to monitor their conversations, while the FBI played dirty with its surveillance warrant against Carter Page, failing to tell the Foreign Intelligence Surveillance Court that its supporting information came from the Hillary Clinton campaign. Now we find it may have also been rolling out human intelligence, John Le Carr& style, to infiltrate the Trump campaign. Which would lead to another big question for the FBI: When? The bureau has been doggedly sticking with its story that a tip in July 2016 about the drunken ramblings of George Papadopoulos launched its counterintelligence probe. Still, the players in this affair—the FBI, former Director Jim Comey, the Steele dossier authors—have been suspiciously vague on the key moments leading up to that launch date. When precisely was the Steele dossier delivered to the FBI? When precisely did the Papadopoulos information come in? And to the point, when precisely was this human source operating? Because if it was prior to that infamous Papadopoulos tip, then the FBI isn't being straight. It would mean the bureau was spying on the Trump camp