John McCain is a conservative republican, regardless of the spin of him being a moderate or maverick. His record on environmental matters in the senate is poor. Although its not as bad a Bush, but then again no one is bad as Bush.

The people who advised Bush in 2000 had Bush lie through his teeth and say he was going to regulate greenhouse gases. These same people are advising McCain's campaign.

"John McCain is a conservative republican...."

John McCain is a man who desperately wants to be president.  

He (like Romney) will embrace any position that he thinks might take him to the White House.  He abandoned any principled stances that he held long ago.

Right now he's trying to build a support group by appealing to people with whom he's never shared common ground.