I don't see him getting 2008/2012 Obama numbers (57% and 58% respectively) but it'll probably be closer to what Kerry got in 04 (53% i think?)
Dude's got anger issues and I can see him getting real flustered in debates. Plus no one likes NJ anyway so lol at someone from NJ being electable.
He won't get flustered unless someone tries trolling him, but I can see him biting someone's head off at a campaign rally on camera.