Gary J. Byrne, a Secret Service officer who guarded the Oval Office during the Clinton presidency, appeared last night on national TV to warn voters against Hillary Clinton.

“Mrs. Clinton is not a leader. She’s a very, very angry person all the time,” Byrne told Sean Hannity on Fox News. “She’s a dictator.”

Byrne added, “She exhibits some very dangerous behavior, as I would describe it. … She’s got this attitude where wants things fixed right now, immediately. She screams and yells at people.”

Byrne’s new book, “Crisis of Character: A White House Secret Service Officer Discloses His Firsthand Experience with Hillary, Bill, and How They Operate,” hits bookstores today.