Remember Trump wanted USPS to become profitable by withholding some funding (while I disagree with him as I run a small business that can only survive using cheapest shipping rates, I understood his reasoning)
The media and leftist went wild like Trump was trying to kill the post office. I find it possible some heads of the post office did actively participate in the fraud because of revenge.
We do know some postmasters were involved in the whole backdating fiasco. Whistleblowers have let this be known.
Where I am coming from is, do not just attack the counting machines, the Democrats, the counting centers, etc. We need to find all angles of fraud and prosecute everywhere until the fullest extent. If there is a big power behind it all, they have several outlets for this fraud. They will not put all cookies in one basket in case it gets caught.