"McCain at first seemed happy enough to do the interview. But his mood quickly soured."

Yeah, guess why. Note that what Time provides here is "an excerpt," so it's not as if the conversation started out this curt.

How many media folks are dying to piss off McCain and get him to blow up and confirm the idea that he's a big hothead? Obviously, he knows that and he's not taking the bait. Yet you still publish an article called "McCain's Prickly TIME Interview," trying to portray it as the blowup you were not able to procure. Lame. Shameless bias.