Put Christie up for president in 2016= another Democrat (most likely Hillary) in the White House.
Leave Christie in Jersey. In a state as blue as New Jersey, Christie works as governor. As president for the whole country. Not so much. He is too RINOy at times. Voters have demanded a true conservative and haven't gotten anyone in 2008 and 2012, and Christie 2016 would be yet another failure of Republican "leadership".
On the subject of "Bridgegate". Its one of those things when Democrats do it, nobody cries foul. Its a play straight from their playbook. I imagine Democrats pull these kinds of stunts on a regular basis in the NYC area. But when a Republican does it, all hell break loose. Should they have done it? Of course not, only Democrats can get away with this type of sleaze. Frankly Republican stink at trying to be Democrats.