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Republican voter sentiment in Iowa, New Hampshire and South Carolina is highly fluid. Compared with Democratic voters, likely Republican voters in these three politically disparate states express less enthusiasm about their field of presidential candidates, and many Republicans voice only modest support for their choices.

Mike Huckabee runs even with Mitt Romney in Iowa, but the former Massachusetts governor holds a wide lead over all of his rivals in neighboring New Hampshire. There is no frontrunner in South Carolina, where Rudy Giuliani and Fred Thompson have about as much support as Romney, closely followed by John McCain and Huckabee.