What about areas like Madison County?
Anyway, btw, does anyone know precisely why Henderson County is so pubbie? I know it has lots and lots of Floridian Retirees, but it isn't like there's a shortage of them in the other mountain counties. I don't think Greenville/Spartanburg/Asheville spillover is the answer, although I'm not sure. Unionist Stronghold?
Looking at some county maps from the late 19th/early 20th century, there seems to be case for this. It was usually more R than the counties surrounding it.