It was in Christie's best interest to have Romney lose. He had designs on running for President in 2016. Ann Coulter & a few others were behind this idea.
With Romney out of the picture - it opened a path for Christie's run.
Too bad he took the 'poison pill' by kissing Obama's butt. His political career as a Republican is over. He may even try running as a Democrat.
After McCain and Romney, all those (Ann included) insisted we run a ‘moderate’ nominee in order to win do not have high credibility. In my book, at least.