Nov. 2 (Bloomberg) -- New Jersey Governor Jon Corzine and his Republican challenger, Christopher Christie, are neck-and- neck a day before the election, according to a Quinnipiac University poll released today.

The survey of 1,533 likely voters shows Christie with 42 percent to Corzine’s 40 percent, which falls within the poll’s error margin of 2.5 percentage points. Independent candidate Christopher Daggett has 12 percent and 6 percent remain undecided.

Thirty-eight percent of Daggett’s supporters told pollsters they may change their minds by tomorrow and 39 percent cite Corzine as their second choice while 29 percent said Christie is their back-up candidate. Only 10 percent of Christie voters and 13 percent of Corzine backers said they might change their mind.

“Daggett is the key to an incredibly close New Jersey election,” Maurice Carroll, director of the Quinnipiac polling center, said in a release accompanying the poll, which was conducted Oct. 27 to Nov. 1.

A Quinnipiac survey released Oct. 28 showed Corzine, a first-term Democrat, ahead of Christie, 43 percent to 38 percent, exceeding an error margin of 2.8 percentage points, with Daggett receiving 13 percent.

Two other polls released today also shows Corzine and Christie in a statistical tie before the election. A PublicMind poll by Madison, New Jersey-based Fairleigh Dickinson University showed Corzine with 43 percent support among likely voters compared with 41 percent for Christie, Daggett received 8 percent. The survey of 1,119 likely voters from Oct. 22 through Nov. 1 has an error margin of 3 percentage points.

A Monmouth University poll of 722 likely voters showed the same results. That survey had a margin of error of plus or minus 3.7 percentage points.

“This race is still as close as it can be,” said Patrick Murray, director of the Monmouth polling center and a professor of political science at the West Long Branch university.

To contact the reporter on this story: Terrence Dopp in Trenton, New Jersey, at tdopp@bloomberg.net.

Last Updated: November 2, 2009 15:30 EST