[MichaelSalib]

And what happens when someone whom you voted as shows up to vote? I mean, if this is going to happen on a large enough scale to affect the outcome of an election, that event has to happen many times. Which means poll workers and police are going to record many cases of voter fraud.

So, can you show me an election in the US where that has happened? Even just one?

Or is this a fantasy?

The point is that if each fraudulent voter has to go to multiple polling stations, that dramatically increases the cost and raises the likelihood of detection. In order to scale that attack up to be practical, you'd need buses full of fraudulent voters going from one station to the next.