One somewhat unintuitive explanation that I haven't seen mentioned yet:
It looks like rural and black counties in North Carolina swung significantly towards Trump.https://twitter.com/MattBruenig/status/1324783880902234113Incidentally, going by the
NYT swing map it looks like this same phenomena occurred across the South, with Trump seeing consistent improvements across rural black ridings in both Alabama and Mississippi.
In Georgia the same thing happened, but the black vote in Georgia is far more urban and suburban than it is in North Carolina. As far as I can tell the urban black vote has generally but not universally swung slightly (1-5% typically) towards Trump and had comparatively low turnout, but the suburban black vote (and
especially the educated suburban black vote) appears to have moved towards Biden by at least as much as the white suburban vote. Fortunately for Democrats in Georgia, there are way more new black and white suburbanites in Atlanta showing up for Biden than black farmers in Macon County going over to Trump.
