The Supreme Court has finally had it with Trump’s plan to steal the midterms

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The Republican justices often put a thumb on the scale to benefit the GOP, but not all of them will put a boulder on it.

On Monday evening, the Supreme Court handed down its long-awaited decision in United States Postal Service v. California — the case involving President Donald Trump’s attempt to sabotage voting by mail in the United States.

If Trump’s attack on mailed ballots had succeeded, it would have given a significant advantage to Republicans in the upcoming midterms because Democrats were much more likely to vote by mail than Republicans in the last several US election cycles.

Get the latest developments on the US Supreme Court from senior correspondent Ian Millhiser.

The decision is a rout. Trump didn’t just lose; the Court’s brief order slips in a line indicating that Trump exceeded his authority and cannot implement such an attack on voting by mail under any circumstances. Not one member of the Court, including the dissenting justices, argues that Trump had the power to shut down voting by mail in the way he attempted to. Trump, in other words, found a line that even this Supreme Court would not let him cross.

The decision in USPS is also the second Supreme Court decision in less than a week that shuts down a Republican Party effort to skew the 2026 midterms in its favor. Last week, the Court ruled that the state of Missouri must use the same congressional maps it used in 2024 (which elected two Democrats), instead of new maps that were expected to elect seven Republicans and only one Democrat.

All of this, from a Court where Republicans hold six of nine seats, and where that Republican majority is often unafraid to go out on a limb to benefit the GOP and its leaders. This is, after all, the same Court that held that Trump is allowed to use the powers of the presidency to commit crimes.

The short answer is that, as the Court moves rightward, the mix of cases that reaches the Supreme Court also changes. Liberals and Democrats — or, at least, savvy liberals and Democrats — stop bringing lawsuits that rest on legal theories that right-leaning judges are unlikely to accept. Republicans, meanwhile, grow more brazen and start bringing cases that would be summarily rejected by a less friendly bench. And red-state lawmakers decide to roll the dice on laws that would be immediately declared unconstitutional if the federal courts were less Republican.

The Supreme Court just handed Republicans a surprisingly decisive midterm loss

As Dartmouth political scientist Brendan Nyhan wrote after the Court (despite its Republican majority) had an unusually liberal term in 2015, “the court’s recent decisions may reflect a change in the cases being considered by the court rather than a shift in the preferences of the justices.”