I didn’t know that you had to register your race in order to vote. Still, I wonder if the drop-off is only seen in the democrat side. Maybe there is a corresponding influx of black and latino voters on the R side. One can hope that the #WalkAway movement is beginning to generate tangible results at the polls.
To your point, if Republicans had relatively improved, especially with minorities, this would be a very significant sign.
Having the primary on a Saturday might have hurt them too.you would have to be a very enthused voter to give up a Saturday.