John McCain is the presumptive Republican nominee for President. Everything he says is calculated. He said what he said about AGW because his handlers decided the time had come for him to say it. It’s about votes. What he actually believes or will do as President is irrelevant at this point.
If Clinton were to be the Democrat nominee, he is not likely to win over many Obama fans. He has a much better chance with Clinton Democrats. His recent statements concerning ANWAR and AWG give a handful of centrist Democrats that have doubts about Obama the ability to rationalize: He may be a Republican, but he GETS it man, he really GETS it. Evidently, the number of conservative votes he stands to lose has been calculated to be expendable.