Governor Bill Richardson just opted in for a White House run. I stand by what I'm about to say: If you nominate him, he wins.
If he is your nominee the GOP stranglehold on the south becomes weakened and he will win throughout the industrial midwest. There will be no nail biting on election night and wondering about how certain votes didn't count because it won't matter. If Bill Richardson is your nominee he will win the White House outright.
The problem is that he will not win a nomination from your party because you will nominate someone who has a long enough public record to be properly Swift Boated.
I wish my own state could have a good governor and sadly it hasn't had one in my lifetime. New Mexico has had two great governors in the last decade with Richarson and former Governor Gary Johnson.
I don't have a formula for how the GOP could win the White House right now. If I see one I'll probably post it.