According to a CBS News/New York Times Poll released November 13, 2007
...GOP hopeful Mitt Romney finds his long-held position as the state's front-runner challenged by a surging Mike Huckabee....
While Romney still leads in Iowa, his support base is far softer than that of Huckabee, a former Arkansas governor whose campaign has gained momentum in recent weeks. Half of Huckabee supporters said they had made up their mind, compared to two-thirds of Romney supporters who said they could change their mind before caucus night. Overall, 57 percent of GOP caucus-goers said they haven't settled on one candidate. (Source: CBS News)
IOWA: VOTE AMONG LIKELY CAUCUS-GOERS
"In this poll, Mike Huckabee is the most-named second choice of Iowa Republican caucus-goers"