The logistical challenges are considerable factor this election. Many people may want to vote for say Biden, but their ballots could be disregarded.
Even without the political fight over USPS funding, it is going to be extremely hard for them to turn around in < 1 week as required in many states, there are also the issue with votes that which are postmarked earlier but delivered later than election date( this is with good reason as you don't want results delayed if you wait for votes to come in)
I am not sure how anyone, without detailed data access to postal operations can accurately predict how much of this going to be a problem.
Even without the political fight over USPS funding, it is going to be extremely hard for them to turn around in < 1 week as required in many states, there are also the issue with votes that which are postmarked earlier but delivered later than election date( this is with good reason as you don't want results delayed if you wait for votes to come in)
I am not sure how anyone, without detailed data access to postal operations can accurately predict how much of this going to be a problem.