Read the full Rasmussen Reports poll

Huckabee and Romney share the lead with 23 per cent of the vote followed by John McCain and Fred Thompson at 12 percent, and Rudy Giuliani at 11 percent. Ron Paul is supported by 5 percent while Tom Tancredo and Duncan Hunter are both at 1 per cent with the rest undecided.  Two weeks ago, Huckabee held a seven-point lead over Romney and Thompson and a month ago Romney and Thompson were tied for the top spot and Huckabee was nine points behind in fourth place. The figures on just how certain voters will stick with their current choices indicate that the race is still very fluid. Immigration rates as the top issue among voters, followed closely by the economy.