Mail-in-ballots: Trump says Democrats will sign two ballots, two hands

Enraged at all the voter fraud carried out by Democrat voters in 2018, President Trump brought to light the likely scenario at the November election:

"The Democrats will continue their usual tricks. In 2018, they voted, went to the car and changed hats. Then they voted again. Now they will obviously do this with write-in-ballots. They will vote with one hand on their own. Then they will sign a bogus vote with their other hand. They tell me this has happened in Detroit."

Curiously, he may be right in one case. Suppose you live with one of those 100 000 people that will have died of COVID19 by November. The ballot comes in through the mail. Of course you send that ballot in. It was Trump that killed them after all.