If you’re interested, this is the recent letter the Senate sent to this guy, outlining exactly how unconstitutional it is. It’s a very good read, you don’t have to be a lawyer to understand it, and it’s and not too long:

https://www.hsgac.senate.gov/wp-content/uploads/260623_USPS_Absentee_EO_Letter.pdf

And before the “strongly worded letter” crowd jumps on, pre-litigation letters are part of how the Senate conducts business. They’re NOT writing this because they think a strongly worded letter will help this hopped-up Trump toadie to find his lost love for democracy, they’re writing it in the form of a brief to create the paper trail and set the stage for the individual states to sue the USPS, because constitutionally in the United States the states control elections, not the federal government. The orange chancre is literally trying to override the Constitution with an executive order (again).

The USPS is part of the executive, the Senate is part of the legislative, and the battle between will be in the judicial: because the underlying issue is an election, powers already clearly assigned by the Constitution, much of this particular battle against extreme federal overreach will likely fall to the states to fight in court, or not.

It isn’t legal. They’re doing it anyway.

It’s kind of a pattern.

Republicans don’t care much about legal unless it’s Democrats doing it.