Notice I did not say, look up the name on the id and search to see if it appears as someone registered and not yet voted. You can check off the first name on the list, does not matter. You continue to check off names, handing ballots to whoever wants to go thru the line however many times, and you are good until you run out of names. Even then you can issue provisional ballots to gum up the works. Voila, 100% voter turnout.
To stop this, Trump has to recruit poll watchers willing to risk life and property to park their car in the worst neighborhoods at 4:30 am, stay all day in a very hostile environment without taking a break, fight to be heard when the time comes to object, and continue until the paperwork is done around 9 pm, only then to run the gauntlet to your car which you will find on blocks if not torched.
The old-fashioned methods of vote fraud probably work best. No computer technology is required.
You might also notice that "absentee ballots" and "early ballots" provide plenty of opportunities to make the votes come out right. There is no way to know who really cast them - the signature verification procedures are a farce.
I am convinced that this is how we get 105% turnouts for entire counties in this State. They always vote for Democrats by some odd coincidence.