Arizona has been doing mail in voting for decades. Probably longer than most states and it hasn't been an issue until Democrats started using it and won. There has been absolutely zero proof of any substantial fraud in US elections.
Progressives haven't seemed to learn you can't get everything you want. We have yet another ideological purity contest where we'll get nothing and Democrats will lose.
I love how Democrats so expertly pulled off this fraud in multiple states but couldn't pull off a bigger majority in the senate. I mean, they couldn't have made Susan Collins lose in a state Biden won by 10 points?