I’d be curious how this is set up to omit convicted felons and foreign national residents — especially the honest ones who know they are ineligible to vote and have no interest in doing so.
Citizenship is one of the fields captured by the DMV requires one to provide proof of citizenship. Registration cards just ask the person to affirm citizenship and sign.
http://www.oregonlive.com/mapes/index.ssf/2015/03/oregons_pioneering_new_voter_r.html#incart_river