The most important swing county in each state

[old timey villain]

Well, most of the counties that swing back and forth are tiny backwoods counties in South Georgia that are 50/50 black and white, so they're not exactly representative of the country or national trends.

Someone mentioned Gwinnett earlier. I think that's a good choice. Previously it had been deep red, but it's diversifying and trending to the Democrats quickly. But it still has a very large conservative white base. In the next few cycles I can see it going back and forth.

Cobb county could become a swing county in the future. And as two of the largest counties in the state, they would certainly become the most important swing counties as well.