Jennifer Rubin: Now we know why Republicans are attacking the FBI

CNN reported that Deputy FBI Director Andrew McCabe this week testified before the House Intelligence Committee and then before members of the House Intelligence, Oversight and Judiciary committees that former FBI director James Comey told McCabe that President Donald Trump had asked for a pledge of loyalty. Comey previously testified that the president had requested loyalty; Trump has denied that this took place.Rep. Jerrold Nadler of New York, the ranking Democrat on the House Judiciary Commit