What do national tickets really do in states they're writing off?

Yeah, I was surprised to see that. I didn’t realize that you could effectively max out spending in a state by buying everything that can be bought before you reach diminishing returns. So the Obama campaign turned its efforts to places like Virginia and North Carolina.

I for one believe that one of the reasons Bush surprised a number of people by winning Ohio despite exit polls showing Kerry ahead was because there was a significant amount of Republican money that came from California - by pretty much conceding that state’s Senate race to Senator Boxer.