The paper issued to the states comes from only one federal govt. source. Each piece has a unique blockchain watermark that is traced through the entire process. Each voter will be given a code linking their vote to the registered ballot. Just as in Apple device passwords, only the end user has access to this password access, given to them and only them when they hand in their ballot.
Obviously this would instantly become the accepted norm in rat areas, unions, and liberal corporations, and making it illegal won't stop it just as the law didn't stop Biden's thugs this year.