Basically, what's happening: in many red counties in FL/PA, thousands of registered Ds who voted Trump in '16 have officially switched to R or, ahem, exited the electorate.
— Dave Wasserman (@Redistrict) August 4, 2020
But on balance, *new* registrants have skewed much more D/unaffiliated than R. https://t.co/p2UwRU7cjL