Christie would have been a better pick than Ryan IMHO. With his as VP, the Sandy incident is mitigated; highlighting the ticket. Throughout the campaign Christie does a better job contrasting the differences between Obama and Romney, plus performs better than Ryan did in the debate against Biden. It's a tight race up until the end, even with Sandy, but on election day Romney narrowly wins.
√ (R) Romney/Christie: 270 (49.3%)
(D) Obama/Biden: 268 (49.2%)
*NJ is the tough one, under these circumstances I could see it going either way: 1. Narrowly for Obama, or narrowly for Romney.
√ (R) Mitt Romney/Chris Christie: 284 (49.5%)
(D) Barack Obama/Joe Biden: 254 (49.1%)