Steve Bannon: Firing Comey was the biggest mistake in 'modern political history'

On "60 Minutes," former White House chief strategist Steve Bannon said he believes Trump's firing of James Comey to be the biggest mistake in "modern political history." Following is a transcript of the video.

CBS: It is also true, many say, and you're a smart guy, that if James Comey had not been fired we would not have the Mueller investigation. True?

Bannon: I don't think there's any doubt that if James Comey had not been fired we would not have a special counsel, yes.

CBS: So we would not have the Mueller investigation?

Bannon: Would not have the Mueller investigation, would not have the Mueller investigation in the breadth that clearly Mr. Mueller is going.

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CBS: Someone said to me that you described the firing of James Comey, you're a student of history, as the biggest mistake in political history.

Bannon: That'd probably be too bombastic even for me, but maybe modern political history.

CBS: The firing of James Comey was the biggest mistake in modern political history.

Bannon: If you're saying that that's associated with me, then I'll leave it at that.