I think he'll hurt Hillary more. He's probably going to take the NY voters away from her. They like Bloomy. Hopefully that's how it works. The NRA, GOA and all other gun groups will come out against him. He'll find out just how wrong his anti gun campaign is. He doesn't have a chance!
If we have a strong candidate (Thompson) and Rudy splits the NYC vote with Hillary, it could be enough to turn NY red.