“Unless they arrange for the person to vote by absentee ballot, “
Now, that’s a very good point! Can we track absentee ballots? Or requests for absentee ballots? If so, a simple comparison of the requests and the fraudulent registrations might be very interesting. And would at least answer part of my question.
Just arrange for lots of people to get absentee ballots, then when delivered have a campaign worker come by to each house, have the person sign, then the campaign worker will "help" fill in the ballot. There have been lots of reports of nursing-home workers giving "help" in filling in ballots for their patients