He's safe. I'm not being sarcastic either.
Likely. Sadly enough, Lautenberg is about the worst Democratic candidate for this seat I can imagine, so if Republicans can't at least do well here even with a no-name like Estabrook, I'm not even sure why they should even bother anymore.
And yes, it should be no surprise that New Jersey is the way it is given the way it votes. New Jerseyans hate Corzine and what he wants to do, but they'd still rather have him over a Republican. It's part of the reason why New Jersey is in such terrible shape politically.