A Justice Department spokesperson told NBC News that the department does “not comment on ongoing investigations.” NBC News, citing a source briefed on the matter, reports that CIA Director John Ratcliffe had made a criminal referral of Brennan to the Justice Department and that it's unclear what prompted the Comey investigation.

Former CIA Director John Brennan told MSNBC on Wednesday night that he is "clueless" about what the Trump DOJ may or may not be investigating him for. "I don't know what is true," Brennan told Nicole Wallace.