Living in Georgia, I can't imagine a place where white people are divided politically or where most vote Democrat. The only places comparable in Georgia would be Athens and some urban yuppie areas of Atlanta.
In these places listed above, how does the white vote split? Is it based on religion or income or ethnicity?
In the Midwest (as that's where most of these counties are), it is more based on income than any other region, I can tell you that. That's why the rich suburbs vote very republican and the poorer rural areas vote split or democratic. Although it mostly has to do with culture and traditions over history.