Video #1, Newt and Nancy sitting on a couch.

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Gingrich has since said that that ad, done four years ago, was “stupid” and a “mistake.” Romney is hardly in a position of strength from which to slam Gingrich on global warming, given the fact that he hired many of the same green operatives now staffing and growing President Obama’s regulatory state.

Romney’s second clip is a bit more effective.

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GINGRICH: Everybody who was profiting from them [Fannie Mae and Freddie Mac] should pay the cost of having failed.

Including “historians” who made $1.6 million from them?

Team Romney is also sending around this exchange from his appearance on Fox earlier today, in which Romney addressed Gingrich’s hit-back that Romney should give back the money he made “bankrupting companies” at Bain Capital.

MARTHA MACCALLUM: “[Will you] give back all the money that you took in the bankruptcies, and the lost jobs and all of that. What is your reaction?”

MITT ROMNEY: “Well, unfortunately the Speaker is way off on that. In my enterprise, we had the occasion to help build tens of thousands of jobs. And he doesn’t understand the economy, if he doesn’t understand that sometimes businesses succeed and sometimes fail. The four enterprises I’ve led have all succeeded. We invested in hundreds of different entities — over a hundred different entities — not all of them succeeded. But to suggest that there is something un-American or something wrong about investing in enterprise that ultimately doesn’t succeed, bespeaks an extraordinary lack of understanding of how the economy works. And by the way, should he return the money that he got from Freddie Mac? That follows his own comment. He said anyone who profited from Freddie Mac should give the money back. Well, he profited $1.6 million from an agency that helped bring down the entire economy; he ought to give it back.”

Gingrich’s hit-back was a flop. Brit Hume led the way in describing it as the kind of thing we tend to hear from the left.