Mail in balloting = in your face fraud.
Back in the Day, Dems would just stuff ballot boxes in advance, now they use the USPS. Dems been cheating since the days of Tammany Hall - that would be since the mid-1850s.
(see https://en.wikipedia.org/wiki/Tammany_Hall).
That’s why there is no road back. Mail voting is not going to stop it will only spread. We are a regional party now