Christie is still pissed that Trump didn’t offer him the AG job.
Christie, dirt bag that he is, would have been better than the douchebag Senator. That was a trap.
you are correct ... that is when he turned ...
My memory fails me often, but I thought it was when Christie was ushered off the transition team or more like when the carpet was pulled from underneath him. And to be sure, chaos ensued shortly thereafter too which didn't give Trump the best look even until now. The transition didn't turn out to be one of those things that instinct alone could tackle.