Sitrep from rural PA
I went and voted just now - my precinct has about 1,500 registered voters, 372 have voted so far in person. No idea how many have mailed-in, but estimates in the State say about 1/3 of registered voters have mail-in. So maybe 500 of my precinct are mail-ins - so 37.2% have voted in person at mid-day. Likely many will come in and vote after work.
My precinct voted 86% for Trump in 2016, and I figure most of the 14% Dems are active or retired coal miners who have voted Democrat all their lives, just like their daddies and granddaddies did. No idea how many turned to Trump this time, but given all the publicity about the Dems wanting to end fracking and coal mining, the percentage for Trump in my precinct will likely be in the 90s.