That sounds insane, that Romney will win NJ, but you never know. What makes you think that?
There is no much reliable polling from New Jersey as of late. The latest Rasmussen poll comes from the end of May showing Romney down 6.
Post convention this poll says -7
http://www.newjerseynewsroom.com/state/romney-gap
Chris Christie is liked in New Jersey. Thats a plus for Romney.
It is not impossible that Romney/Ryan could win New Jersey. I wish we had more polling to find out if it is as close as I think it is.