This sort of thing occurred out here in CaCaLand during the fake recall of our Guv'na, Newsome. Just before the day of voting a convicted felon was found asleep/unconscious in his car. With him he had a loaded gun (illegal in Ca), a bag of drugs (ditto) and 300 ballots.
within 24 hours he was released on his own recognizance. Never heard anything further.
Illegal aliens (yeah, not immigrants) are provided with driver's licenses -- oh, heavens, not for voting ID! No, 'cause now when you do that you are immediately registered to vote -- wanna guess which party is the default?
Now, how much you wanna bet that the address is valid? Or, perhaps, off a list of drop boxes maintained by Ca DNC officers?
In the 2020 vote in Detroit, one polling station had >130K ballots for people not registered. Uhh, and you don't think this was widespread?