The democrats literally attempted to do a mail-in election, ban voter ID and end voter signature verification all at once.
If you have to make the mailing system incapable to prevent the democrats from rigging the system then so be it.
https://www.npr.org/2020/06/01/865043618/need-a-witness-for-your-mail-in-ballot-new-pandemic-lawsuits-challenge-old-rules?t=1597152985684