Newt Gingrich on Chris Christie's comments during the 2012 campaign: "I'm a big boy and he's a big boy"

On the eve of the release of "Double Down: Game Change 2012," the forthcoming book from Mark Halperin and John Heilemann, on Monday night Piers Morgan welcomed Newt Gingrich for a live, primetime interview.

Recent revelations from the non-fiction work include references to the former House Speaker by Chris Christie, who apparently had some less than complimentary things to say about Gingrich during the most recent presidential campaign.

"Chris Christie seems to have absolutely trashed you in this phone call to Mitt Romney, calling you 'a joke, you can't be taken seriously,'" Morgan said to Gingrich, referencing experts from the follow up to Halperin and Heilemann 2010 work, "Game Change." "What is your reaction?"

To his credit, the former presidential candidate took the high road:

"It was a tough campaign. Christie was on the other side. He talks about like he talks," he explained. "I don't have any reaction."

More than a year since the supposed incident, Morgan wondered if the two had spoken about the comments.

"Has he contacted you, Chris Christie, to say sorry or explain himself?"

Not only has the conversation not been revisited, but it doesn't seem to bother the man who was supposedly insulted:

"No, I couldn't care less, and he couldn't care less," revealed Gingrich. "I'm a big boy and he's a big boy."

Watch the clip for more of Morgan's interview with Gingrich, and for the next edition of "Piers Morgan Live," watch CNN every night at 9.
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