Maybe also:
Interview all USPS workers who handled late ballots regarding backdating.
2 have already come forward to testify, 5 more leaking info anonymously
from @TimMurtaugh
In the primaries, Nevada mailed every registered voter a ballot.
200,000 came back as undeliverable.
So what did they do for the general election?
Just mailed them again.
If you want to look for irregularities, maybe you should start there.
Good idea.