IMHO, the same argument can be said of Huey Long Huckabee. A candidate who says he doesn't believe in evolution doesn't have a snowball's chance in global warming.
You've got to be kidding. First, it's not an issue that has significant relevance to a presidential campaign. Second, even if it was, something like 77% of Republican voters and over 50% of Democrat voters reject evolution. If anything that should have been a plus for anybody but the godless left wing of the democrats.