Take a look at what “New Donkey” (i.e., a sharp Dem politico from Georgia) has to say about who’s winning the ground game going into the election.
As ND says, the ground game only really comes into play if the election is within a few points, tops. But if it does — and there’s certainly reason to believe this one will — the ground game can be decisive.
At the same time a good ground game — at least the voter registration part of it — can be hobbled mightily if opposing elected officials find ways to disqualify or throw out lots of new voter registration applications, as they seem to be doing in Ohio.