If McCain beats out Romney- what will the Replicans who hate McCain do- Vote for Hillary?

I am guessing that they will either vote for McCain, write in Romney/Huchabee, or not Vote at all. Most right wingers would never even think of voting Demecrat. The odds of them voting McCain would also be higher if he gets either Huchabee or Romney (probably Huckabee) to run as his VP