Chris Christie and Global Warming

Why doesn't the vaunted governor of New Jersey, Chris Christie, believe in a human influence on global warming, as do essentially all earth scientists in existence? Because, well.... he can't really say. It seems to depend on which TV program he watched last night:

Mankind, is it responsible for global warming? Well I'll tell you something. I have seen evidence on both sides of it. I'm skeptical -- I'm skeptical. And you know, I think at the at the end of this, I think we're going to need more science to prove something one way or the other. But you know - cause I've seen arguments on both sides of it that at times - like I'll watch something about man made global warming, and I go wow, that's fairly convincing. And then I'll go out and watch the other side of the argument, and I go huh, that's fairly convincing too. So, I go to be honest with you, I don't know. And that's probably one of the reason's why I became a lawyer, and not a doctor, or an engineer, or a scientist, because I can't figure this stuff out. But I would say at this point, that has to be proven, and I'm a little skeptical about it. Thank you.

I wonder if he makes all his big decisions this way?