Is former New York City mayor Rudy Giuliani sorry that he’s not trying again this year to win the Republican presidential nomination?

Former New York mayor Rudy Giuliani in a file photo from his failed 2008 presidential campaign. (KEVIN KOLCZYNSKI/REUTERS)

That’s the question CBS’s “Face the Nation” host Bob Schieffer asked Sunday of Giuliani, who ran in 2008 against former Massachusetts governor Mitt Romney as well as the ultimate GOP nominee, Sen. John McCain (R-Ariz.). Giuliani didn’t hesitate.

“No!” Giuliani said. “If Mitt Romney, having changed all those positions, isn’t conservative enough yet, believe me, I wouldn’t have had a chance.”

Giuliani, who placed all his hopes four year ago on Florida and came up short, said he has a keen enough understanding of the early primary and caucus states to know they overwhelmingly favor conservative candidates.

“I’m realistic enough to know how Iowa, New Hampshire, South Carolina, Florida, how they would vote,” Giuliani said. “And they would like me on economics, they would like me on national security, but they wouldn’t like me on my social views and I’m not about to change them. They are very much with me.”

And while Giuliani noted he and Romney shared some of the same positions, and suggested former House speaker Newt Gingrich should tone down his criticism of Romney’s business record, he didn’t exactly shower Romney with praise.

“I am a moderate Republican. That’s what I am,” Giuliani told Schieffer. “So I’d be inclined to support someone like Mitt Romney, but all those changes in positions give me pause. But, like Newt, my major concern is defeating Barack Obama, so I want to be careful that we conduct an issues-oriented campaign that grows these candidates and doesn’t destroy them.”