A “brain drain” in Justice Department and FBI national security and counterterrorism units could reduce their ability to prevent potential terror and cyberattacks by Iran, former officials say.

"The senior ranks of the FBI and DOJ's national security teams have been decimated," one former senior DOJ official said. "As a result, the FBI and Justice Department are completely unprepared to respond to a crisis, including the fallout from the current conflict in the Middle East."