Shannon, SD
6.0 people per square mile.
Kerry won 84.6-12.5
Todd, SD
6.5 people per square mile.
Kerry won 72.2-25.2
Buffalo, SD
4.3 people per square mile.
Kerry won 71.7-26.5
I think those are about the poorest areas in the United States.
Kerry won Corson, SD, which has 1.7 people per square mile.
Indeed, Native Americans. Shannon, SD, is my "home county," so to speak. It was a 2000-to-2004 flip. The Native Americans really got the vote out this year.
In any case, Democratic rural areas tend to be seperatable into a few categories:
1. Heavily populated by minorities (Shannon, SD)
2. With a large service industry population, like with ski resorts (Alpine, CA)
3. With a large "latte liberal" population or year-round vacationers (Blaine, ID)
4. With extreme left economics that outdo social leanings (Mingo, WV)
5. With an odd population attraction, such as environmentalism (San Juan, WA)
6. Counties that actually have major population centers but are huge (St. Louis, MN)
7. A mainly northeastern phenomenon of progressive rural counties (the entire state of Vermont)
Basically any rural county can be seperated into one or more of these seven counties.