Or just stand there. Where I'm from, representatives from each party and members of the public will be present the whole day.
Mail in voting? Early voting last for up to 2 months. That doesn't scale to 100M votes
By "using paper ballots" I understood it to be in-person, voting by mail has a lot of issues indeed.
Usually in person voting is done through a machine. Where as vote by mail is a paper ballet
Only in the united states (where i am not from). Normally i think of paper ballots as the hand counted sort.
However as long as tge machine is just a scanner (still paper trail) much of the same argument spplies.
Just livestream the whole process.