Is NJ Chris Christie a climate change true believer?

If you examine Christie's position, he has left himself a lot of wiggle room. He says global warming is real and humans contribute to it, but the degree is subject to debate. That isn't too different from what many labeled as deniers believe. It is warmer than 150 years ago, but we were in a period known as the little ice age at that time. Humans do likely contribute to warming, but man-made CO2 is clearly not driving warming. CO2 has risen dramatically in the last couple of decades, but the temperature has been stable for 17 years. As you can see, it isn't what Christie said as much as what he did not say. I don't believe he can be trusted to not flip completely and go for a carbon tax or more CO2 regulation if he were to win.

Via The Hill:

New Jersey Gov. Chris Christie broke slightly with many of the announced and potential Republican presidential candidates, saying that climate change is real and that humans contribute to it.
“I think global warming is real. I don’t think that’s deniable,” Christie said at a Keene, N.H., event, according to MSNBC. “And I do think human activity contributes to it.”
Christie later added that the degree to which humans contribute to climate change is still subject to debate.
Christie has previously acknowledged a human role in climate change, but he has not recently spoken about his position in depth.