Corzine's problem is that "former Goldman Sachs CEO" is not something you want on your resume now.
Yeah and the GOP is using that against him. They don't even call him "Governor" Corzine these days; it's "Wall Street Businessman."
At the same time, the Dems are going out of their way to also call him a businessman, saying they need someone who understands business in office these days and that Christie's corruption fighting (which they're already tarnishing as a giant fraud) doesn't matter to the voters these days. In fact, it never truly matters to these people. They bitch about corruption and then, when push comes to shove, they re-elect their leaders. The hilarious part is how the NJ Dems are basically coming out and saying, "Folks, listen, we know you don't really care about corruption so we're going to say it. We know that you especially don't care about it in the midst of an economic crisis."
In the end, I think the latter message will win.