Zero vs. Slick Willard is a Democrat party runoff.
Slick has no chance of winning the white house anyway. I’m sure the GOP will find someone conservative to install on the ticket with him but I think he has even less chance of being president than McCain.
However I should point out that I don’t believe the GOP has any intent of winning the white house anyway. After all, they’re still quite powerful even when in the minority and they have to worry less about conservatives to get elected.