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US presidential hopeful Mitt Romney has won a resounding victory in Florida's Republican primary election. He beat his nearest rival Newt Gingrich in a campaign that was marked by personal and vicious attacks between the two men. Addressing his supporters after his win, Romney promised to offer a "winning ticket for America" at the general election in November. Two other candidates, Ron Paul and Rick Santorum, didn't campaign in the Sunshine state. Al Jazeera's Andy Gallacher reports from Tampa, Florida.