Political columnist Charles Krauthammer said Tuesday that newly released emails regarding the 2012 attack on the U.S. compound in Benghazi, Libya, are the "smoking document" exposing a White House cover-up of a cover-up.

The emails provide evidence that top White House aides were involved in pushing a narrative that an anti-Islamic video was the impetus for the attack on the American consulate in Benghazi that killed Ambassador Christopher Stevens and three other Americans.

"It is in conflict with what we've been told, with what Jay Carney has been saying," Krauthammer said on Fox News. "Their story has always been this stuff all came from the CIA, from intelligence, so it was completely clean."

He went on to say, "We now have the smoking document, which is the White House saying, 'We're pushing the video because we don't want to blame it on the failure of our policies.' "

Krauthammer described the Obama campaign's foreign policy narrative in 2012 as "Al Qaeda is dead, GM is alive."

"This undermines the whole narrative," Krauthammer said. "Therefore they have to invent the video."

"I think the Republicans have something here that really ought to be looked at. I just don't know if there's gonna be any interest in the mainstream media. They should, because this exposes a cover-up of a cover-up. The fact that it was redacted when the documents were asked for and only revealed by a court order is telling you this is a classic cover-up of a cover-up, and that is a serious offense."