This morning, Quinnipiac puts Chris Christie up by only 4 percentage points.

Democratic incumbent Gov. Jon Corzine has cut Republican challenger Christopher Christie’s lead in half and now trails the former federal prosecutor
43 – 39 percent among New Jersey likely voters, according to a Quinnipiac University poll released today. Independent candidate Christopher Daggett has 12 points, with 6 percent undecided.

As in Virginia, as we got closer to Election Day, it was likely that some unenthusiastic Democrats would jump on board. But Christie’s campaign has still felt a little complacent in recent weeks, and I’d expect to have a larger lead when I’m running during a recession and 56 percent of voters have a negative opinion of the incumbent. Christie did an interview with Neil Cavuto yesterday; he needs to be out there a lot and making the case of how he’s going to rejuvinate the state’s miserable economy. Christie’s campaign has been defensive and reactive in the past month; he’s got to remind the voters that Corzine has to justify another four years, not just find ways to mock Christie’s weight and insist he’s Obama’s real running mate.

Having said that, Jon Corzine still hasn’t surpassed 42 percent in any poll this year.

UPDATE: Christie’s campaign manager, Bill Stepien, offers a statement on the poll:

Jon Corzine has spent millions of dollars on negative, nasty attack ads, yet 61% of New Jerseyans still believe Jon Corzine will raise their property taxes. Jon Corzine continues to reach into his deep pockets to scare voters and distract from his failed record, but over half of New Jerseyans don’t approve of his job as governor and believe his policies have driven the state’s economy into the ground. Jon Corzine can spend as much of his Wall Street millions as he wants on negative attack ads, but Chris is the only candidate with an independent approach to bring real change to struggling New Jersey families.