Elsewhere, two candidates trailing McCain and Romney in polls sought to gain ground.
In Sarasota, Rudy Giuliani argued that he is a perfect combination of the two -- encompassing McCain's foreign policy strength and Romney's economic know-how. "I've had experience in both areas and results in both areas," the former New York mayor said after drawing a few hundred people to a restaurant on a town square.
Mike Huckabee toured a 1,600-acre, family-owned farm in Lake Wales and talked with local citrus growers about challenges facing them: hurricanes, crop diseases and the cost of labor. He also sampled barbecue and posed for pictures with supporters at the Lakeland Pig Fest.
Ursula Fahy and Matt Stuart and The Associated Press contributed to this report