What Christie did is give the media a sound bite of him with President Obama saying "The President is going a great job!"
Yet as of that moment, the only "great thing" Obama had done was walk down the street with Christie. Oh how great! Obama can walk. And after getting that sound bite, Obama didn't even visit any other area, including New York, and flew off to Las Vegas.
There are only a few possibilities - all plausible:
1. Christie was just star struck by being in Obama's presence, like an infatuated teenager
2. That he feared Obama would block all aid, living the crisis all landing on Christie and maybe then costing Christie re-election
3. Christie wants to leave 2016 open for himself - with Romney going from 10 points behind when Christie endorsed him to in a deadheat.
4. Christie is just a big mouthed fool.
Romney diverted significant sums of $$ from his campaign towards aid. Did any - even ONE - Democratic endorsing Obama praise Romney? Or did they only used that too as an attack - that Romney was playing politics with a crisis? Of course that is what they would do - that's politics. Nothing wrong with that. Its called playing to win, rather than being an idiot. If you HIGH PROFILE ENDORSE SOMEONE, you do not in the last minute declare the other candidate is "doing a great job!"
For Christie to give the media the sound bite for them to play over and over and over and over - Christie being Romney's keynote speaker - "The President is going a great job!" was ignorant and naive at best. That was the premier sound bite then of every network, when polls shifted to a majority of voters saying Obama's doing a good job, and that was when Romney's campaign begin losing ground.
If Christie was being anything but a fool at best, as of the moment Christie said that raving praise, can anyone name anything Obama had actually done - other than walk down the street with Christie? Anything "great?"
Christie's either is an idiot or a double-crosser. No other way to read it.