Former Gov. Mitt Romney was asked late Friday afternoon at a St. Petersburg private airport to respond to the news that Sen. John McCain had won the endorsement of Sen. Mel Martinez.

"I think endorsements by and large are nice things to get but don't do a lot for you in terms of actually getting votes," Romney said. "I always try to seek good endorsements....but if other guys get them, well, that's fine, you can't get 'em all."

Later, Romney Florida campaign chair Al Cardenas acknowledged he has spoken with Martinez often in recent weeks also courting his endorsement.

"If he was not going to support us, I'm glad he supported somebody at the end of the process, when a lot of people have already made up their minds as they intend to vote," Cardenas said.

Today, the Romney campaign released a new web ad that spoofs a real McCain ad, saying that McCain is the "favorite Republican among Democrats."