By tallying votes which don’t correspond with legitimate voters.
That is at least in the realm of possibility. They would have to be fraudulently registered (e.g. illegal immigrants). But there are people looking for that as well. There are also provisional ballots from people who are not registered but presumably those have to the checked by both parties before they can be tallied
“By tallying votes which don’t correspond with legitimate voters.”
My guess is that they first search the registrar for registered voters who did not vote. Then it is only a matter of signing there name and filling out a ballot.
Aw, come on, the dead have every right to vote Democrat! (Sarc)