McCain COULD exploit B. Hussein, but won’t. Hell he already apologized to him once! Half the people in this country hate Hillary. McCain is anemic, but has a better chance of beating her.
Don’t know that we will ever be able to prove it but I would be willing to bet the crossover vote totalled less that 1/2 of 1%. That a fair amount of time on talk shows was given to people who did so should in no way be definitive proof that crossover voting happened in a big way. I see the impact as being at best minimal.