GINGRICH: He spent 10 years --
BLITZER: -- only years later did he look at it.
GINGRICH: So he spent 10 years earning a -- he's attacking me for serial hypocrisy and he spent 10 years earning money out of a newsletter that had his name, that he didn't notice. Now all I'm saying is I think he's got to come up with some very straight, very straight answers to get somebody to take him seriously.
Would I be willing to listen to him? Sure. Are there circumstances you'd have to weigh heavily? Yes. I think the choice of Ron Paul or Barack Obama would be a very bad choice for America.
BLITZER: Would you run as a third --
GINGRICH: I think -- I think --
BLITZER: Would you run as a third-party candidate?
GINGRICH: No, I'm not -- I'm not -- it's not going to happen. He's not going to get the Republican nomination.
BLITZER: What if he did? What if he did?
GINGRICH: He's not going to.
BLITZER: He might win here in Iowa.
GINGRICH: He's not going to get the nomination. It won't happen. The people in the United States are not going to accept somebody who thinks it's irrelevant if Iran gets a nuclear weapon.
And I think that is a national security threat to the United States of the first order, and I'm very willing to draw the line and say to everybody in this country, if you think it doesn't matter for the Iranians to have a nuclear weapon, then Ron Paul's a reasonable candidate. But if you think the Iranians might use it on an American city, then you had better find a different candidate than Ron Paul.