It would shock me in no way if there were larger, more institutional forms of voter fraud being committed by Republicans at municipal and county levels to wipe out large amounts of votes. As is so often the case, when the GOP goes out of their way to accuse someone else of bad behavior, it's something they observed in the mirror first.

Also, another incident of vote fraud, favoring Trump.

https://www.newsweek.com/maine-college-student-accused-voting-roommate-faces-5-years-prison-1542677