(iii) Proposed provisions specifying that the USPS shall not transmit mail-in or absentee ballots from any individual unless those individuals have been enrolled on a State-specific list described in subsection (b)(iv) of this section with the USPS pursuant to this subsection.
SCOTUS backed down from that one because their billionaire owners didn’t like the complete anarchy of the tariffs. This one increases billionaires power over the populace via voter intimidation so SCOTUS will be fine with it.
I see it more as the court recognizing that if they just rubber stamp Trump’s wishes, they destroy their own power, and Trump is notorious for fucking over pretty much everyone that joins him. In this instance, they would effectively be handing total control over to Trump, who is clearly face-planting across the board, destroying the U.S. in the process.