MOST states (purple, blue, red) have mail-in voting. https://en.wikipedia.org/wiki/Postal_voting_in_the_United_St...
Challenging the rules: https://www.pbs.org/newshour/politics/supreme-court-revives-...
Changing the rules at USPS: https://www.pbs.org/newshour/nation/how-this-new-mail-rule-c...
And I'd fully expect some fuckery via executive orders closer to the election, and SCOTUS to use the emergency docket to let them "temporarily" be enforced.
"A pair of armed and masked men in tactical gear stood guard at ballot drop boxes in Mesa, Ariz., on Oct. 21 as people began early voting for the 2022 midterm elections."
They might be "off-duty" but this is during Biden's admin. They're immensely more emboldened now and local LE will absolutely not enforce any laws restricting this.
Source: https://www.cnbc.com/2022/11/06/election-officials-facing-ar...