My own point was that it is precisely John McCain's record outside of his admirable military service that is his problem. He has become progressively more liberal with time (not just last year), and has almost made a career out of dumping on his fellow Republicans. That's why the media loves him - at least for now.
McCain must know how this works by now: when the media need you, you're a "maverick", an "independent" and a "free thinker"; when they're finished with you, you're simply "unprincipled" and untrustworthy".
Oh, McCain is a backstabber (many levels away from Benedict Arnold and traitor), and the media is going to turn on him when it becomes a two person race, just as you said.