I won't vote for McCain.
If McCain is on the ballot I will vote for any other morally palatable choice. If there aren't any, I'll write in my own name.
For those who want to depend upon a Sophie's Choice obliging me to vote McCain out of fear of something worse, think about it. Don't put me in that position. If McCain is the best the party has to offer, the party is broken.
I call this the Hillary Sock Puppet tactic. Just wave the puppet and go "boo!" and supposedly every Republican will have to swallow what the elites dish out.
I view the choice as between a crook and a kook.