It doesn't matter that there is no proof-it damaged his image and took the air out if his momentum..
What momentum? It was the Democrats who speculated his "frontrunner status" for the 2016 GOP nomination. They then attempted to use "bridgegate" as his "big scandal" to invalidate him.
I stand by my assessment that if Christie would not be morbidly obese, he would be the top GOP candidate right now.