Andrew McCabe said Trump's controversial choice is a "terrible development" for those at the agency and his lack of qualifications aren't up for "debate."

Kash Patel has called for radical changes at the FBI and was a fierce and vocal critic of the bureau’s work as it investigated ties between Russia and Donald Trump’s 2016 presidential campaign.

Patel, President-elect Donald Trump’s choice to run the nation’s premier law enforcement agency, is the author of a list of “deep state” officials to target.