> But realistically, the states interested in doing this don't have enough time before midterms to do this - as they would have to then process all of the proof-of-citizenship documentation or open themselves up to mass lawsuits

Except we've seen this before. States purge roles, judge orders them to restore it, oopsie we can't do that before an election, judge permits it to continue until after the election. We've seen this with voter roll purges, gerrymandering, etc. Surprisingly it only seems like one party does this, the party that supposedly supports democracy.