Mitt Romney has enjoyed a healthy lead in most New Hampshire polls, but the new one from CNN shows him and Rudy locked in a dead heat.

Romney leads with 25% to Rudy's 24%, a statistically insignificant margin, followed by John McCain at 18% and Fred Thompson at 13%.

Back in July, Romney had a more than significant lead of 14 points in CNN polling, with 33% support to Rudy's 18%. McCain is up six points since then, and Thompson's support is unchanged.