"You scolded Mitt Romney, his friends who are running this Super PAC that has funded that, and you said of Mitt Romney, 'Someone who will lie to you to get to be president will lie to you when they are president. I have to ask you, are you calling Mitt Romney a liar?" "Yes," Gingrich replied.

Newt Gingrich tells CBS that Mitt Romney is a liar ...

... who needs to stop deceiving the American people ...

"I just think he ought to be honest with the American people and try to win as the real Mitt Romney, not try to invent a poll-driven, consultant-guided version that goes around with talking points, and I think he ought to be candid. I don't think he's being candid and that will be a major issue. From here on out from the rest of this campaign, the country has to decide: Do you really want a Massachusetts moderate who won't level with you to run against Barack Obama who, frankly, will just tear him apart? He will not survive against the Obama machine."

... but that being said, he'd still vote him over Barack Obama:

Yet, when pressed by CBS News' chief Washington correspondent Bob Schieffer on whether he could support Romney if the "Massachusetts moderate" became the Republican nominee, Gingrich replied, "Sure. I would support a Republican candidate against Barack Obama because I think Barack Obama is tearing the country apart.

So Newt Gingrich thinks Mitt Romney is a dissembling robot who cannot be trusted, but his name isn't Barack Obama, so he'll get Newt's vote. With endorsements like that, Romney doesn't need opponents.