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DUNEDIN, Fla. — Make no mistake: Mitt Romney isn't taking his foot off the gas — or off Newt Gingrich's neck.

The Republican presidential candidate on Monday expressed confidence of victory in Tuesday's Florida primary. But he also made clear that he's girding for a long, state-by-state fight for the nomination against his chief rival and the other candidates still in the race.

Over the course of the day, Romney continued to pummel Gingrich at every stop, even though polls show the former Massachusetts governor with a comfortable lead.

Just a week ago, Romney arrived in Florida nervous and tired after a staggering loss to Gingrich in South Carolina. He's spent the past week attacking Gingrich at every turn and assailing him on TV.