One thing that experts have worried about it is faulty electronic voting technology. This video reveals that some machines have dangerously flawed programming:
As precincts move away from paper ballots, which can be time-consuming for election workers, it’s important for voting machines to be tested and calibrated to be in proper working order. Although most of the fears about voter disenfranchisement tend to be overblown, it is worrisome to see machines that are making such large errors. The problem won’t be solved just by switching back to paper ballots — plenty of errors happen there too. The real solution is meticulous election board practices. Machines should be tested and in good working order long before election day.
Cross posted at Pushback.