^ Even more so in the South. Though realignment happens (much more slowly then on federal , and even state level) even locally. Recently i looked at Holmes county, Florida, election results page (this is very white and extremely conservative county in North Florida, where Hillary didn't get even 10% of vote, but registration is only slightly Republican). According to data gathered by. Pres. Griffin, local Democrads still hold a number of local offices in this county. But, looking at 2016 results, i couldn't find a single Democratic victory. Some candidates managed to surpass 40% plank (much better then national party candidates), but still - ....
On the other hand - Liberty county (not far from Holmes) still has about 75-20% Democratic registration, still elects only Democrats (and NPA's) for local offices, AND gave Hillary less then 20% nevertheless....
Yeah, in some Kansas counties it's happened over time. Cherokee County (which votes kinda like lots of Appalachian Counties), was Democratic locally for a long time. Now, though, Democrats struggle to even win downballot. Minus in Weir and Scammon, two tiny former mining towns where even national Democrats won until very recently. Weir has a 20 some year old Democratic mayor.