Former White House chief strategist Stephen Bannon said that President Trump firing former FBI Director James Comey was the biggest mistake in “modern political history.”

Asked during an interview on “60 Minutes” Sunday if it was true that he called the Comey firing the “biggest mistake in political history,” Bannon said, “That probably would be too bombastic, even for me, but maybe modern political history.”

Bannon told interviewer Charlie Rose that had Trump not fired Comey, the president would not be faced with an investigation into possible Russian interference in the 2016 presidential election.

“I don’t think there’s any doubt that if James Comey had not been fired, we would not have a special counsel,” Bannon said, referring to Robert Mueller.