I have a strong suspicion the majority of those folks are Republican. Matthew Yglesias did a write-up on this some months back, where the data showed that in co

I have a strong suspicion the majority of those folks are Republican. Matthew Yglesias did a write-up on this some months back, where the data showed that in counties where Democrats aggressively helped people obtain ID documents, those initiatives backfired apparently as seen by lower D-skews in those counties. So it actually works in favour of Democrats that for lower level elections, more people aren't registered to vote. While for federal elections, it goes the other way around, what with all the gerrymandering and hindering.