Comey called out Obama and Lynch in his new book, A Higher Loyalty, set to come out on Tuesday. In it, he defends the FBI's top brass and counterintelligence investigators charged with probing Clinton's use of a private email server and mishandling of classified information, reports the Washington Examiner, which received an advanced copy.

"I never heard anyone on our team — not one — take a position that seemed driven by their personal political motivations. And more than that: I never heard an argument or observation I thought came from a political bias. Never ... Instead we debated, argued, listened, reflected, agonized, played devil's advocate, and even found opportunities to laugh as we hashed out major decisions.