Have you ever been concerned about corruption within your postal service influencing the outcome of the election? Because the postal workers' union here in the USA just endorsed Joe Biden. That pretty much taints the whole deal for me.
This one is easy to clear up.
Its the postal workers UNION. *duh*
So how do you prevent them doing 'something'? Well, you have them work together with other workers who arent union (check), you make them transport ballots in unmarked envelopes (check), that become void when you open them (check), and you scare the living bejebus out of them that they are out of a job if they are ever caught... (check). How do you ensure thats enforced? Idk, you assign them randomly, but if possible have them take the same routes for years (partly check), so they develop a sense of community, you create an independant agency (check), thats preoccupied with being the best at their type of bureaucracy (check on checklists

) - and it turns out that you can have per mail voting.

Oh and you have an independent watchdog organization that looks into assertions of problematic behavior (also check).
(If it werent for the 'vote solicitation issue' (thats why you never can have the default be 'vote at some place', majority always has to vote in private in a public place (you basically have to make sure it remains a public ritual), or you'd get a culture change (bosses expecting to have a say in their employees votes...)).)
(Many eyes looking at this to ensure impartiality where it matters. This is the individual postman, this is the guy at the sorting plant, this is the whistleblower that tells media, that if dems dont put forward funding, people would have a few sorting machines less come voting season.)
But furthermore, US is not a direct democracy by a long shot (one person one vote), so turns out, in the end the entire voting process is almost always more about framing the narrative. Meaning "how do you tell a story that makes you 'the winner' with more people agreeing than revolting (actually it only needs a critical mass at the revolting stage..

) - you do that by changing the narrative of what 'mail voting means'.
This year apparently its dangerous, because, evil forces.
(Russians on facebook, spending 300k on political ads..

)
Can you bring a statistical argument for why? Trump is criticized, that he cant.
Finish your own picture from there. Preferably one thats not afraid of the evil individual postman opening up envelopes, and presorting.