Gingrich swept into Florida, only to run headlong into a different Romney from the one he had left in his wake in South Carolina.
Romney, the former Massachusetts governor, shed his reluctance to attack Gingrich, the former House speaker, unleashing hard-hitting ads on television, sharpening his performance in a pair of debates and deploying surrogates to the edges of Gingrich’s own campaign appearances, all in hopes of unnerving him.
Restore our Future, an outside group supporting Romney, accounted for about $8.8 million in the ad wars, and the candidate and the ‘‘super PAC’’ combined outspent Gingrich and Winning The Future, the organization backing him, by about $15.5 million to $3.3 million, an advantage of nearly 5-1.
Gingrich responded by assailing Romney as a man incapable of telling the truth and vowed to remain in the race until the Republican National Convention next summer. He won the endorsement of campaign dropout Herman Cain and increasingly sought the support of evangelicals and tea party advocates, a former House speaker running as the anti-establishment insurgent of the party he once helped lead.
Bombarded by harsh television advertising, some Floridians said they had soured on both candidates.
‘‘The dirty ads really turned me off on Mitt Romney,’’ said Dorothy Anderson, of Pinellas Park, adding she was voting for Gingrich. She said of Romney, ‘‘In fact if he gets the nomination, I probably won’t vote for him.’’
At the same polling place, Romney supporter Curtis Dempsey expressed similar feelings but about Gingrich. ‘‘The only thing Newt Gingrich has to offer is a big mouth,’’ he said.
Voters frequently say they are offended or appalled by negative ads. But polls show consistently that the commercials are able to sway the opinions of large numbers of voters, and they are a staple of nearly all campaigns.
