is he even human?!

Wow
Does Laura have to call him Mr. President too:

BUSH: You know, it's interesting, you said that one of the things that we love doing is to invite our buddies up from Texas. And I think about the time we had Jones, Procter and Selee . These are guys we grew up with in Midland, Texas. They are down to earth, you know, they have no agenda, except being with their friends Laura and George.

VARGAS: They call you George?

BUSH: No, they call me Mr. President.

VARGAS: I was going to say…

BUSH: They probably don't want to call me Mr. President, but they do call me Mr. President. And we sit up there in the White House. First of all, it's a great joy to see their joy about being here. It's a fantastic experience for people to be able to come here.

(Eschaton)
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So, his friends that he "grew up with" (even though he was not brought up in Texas) have to call him "mr president"?!?! Boy, they must feel like close friends!