Romney: Election Is About "Heart And Soul" Of GOP

From CBS News' Scott Conroy:

SAN DIEGO -- Although polls show John McCain would have the best chance of any Republican candidate to win the general election, Mitt Romney said that his message of change would be the most salient in November.

"If you think about debating Barack Obama or Hillary Clinton and who our nominee is going to be, we've got to make sure we have a nominee who can stand up and articulate a vision for America's future, not someone who's lost in the past," Romney said at an outdoor rally in front of an enthusiastic crowd of several hundred people.

Though he called John McCain "a fine man and a national hero," Romney argued that the Arizona senator would be unable to unify the conservative base.

"We're going to make a choice here about the heart and soul of the Republican Party. I'm really — I'm serious about that," Romney said. "Are we going to stay in the house that Ronald Reagan built or are we going to take a different course?"

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    Scott Conroy is a National Political Reporter for RealClearPolitics and a contributor for CBS News.