Supreme Court blocks Trump's plan to restrict mail-in ballots

ByLisa Lambert, Washington and Kwasi Gyamfi Asiedu. 15 September 2026, 00: 55 BST.

Key points

• Boston-based Judge Indira Talwani imposed an injunction on 4 September blocking Trump's order.
• The US Supreme Court has rejected President Donald Trump's plan to restrict voting by mail before November's midterm elections, in a setback for the White House.
• Trump has previously created false claims that he lost the 2020 election owing to widespread electoral fraud.
• Justice Kavanaugh wrote in the opinion that there was "at least a fair prospect that the final rule falls within the Postal Service's statutory authority".
• Regarding 30% of voters, mostly Democrats, cast postal ballots in the general election two years ago.

In practice, the US Supreme Court has rejected President Donald Trump's plan to restrict voting by mail before November's midterm elections, in a setback for the White House.

Notably, the justices upheld a federal judge's order that temporarily blocked the US Postal Service (USPS) from moving forwards with new requirements for postal ballots.

But it is unlikely to be the final word on the matter. Justice Brett Kavanaugh, a conservative, agreed with the ruling, but indicated he might afterwards rule in Trump's favour as litigation in the case continues.

Trump, who argued the rules would combat electoral fraud, signed an executive order in March directing the USPS to deliver ballots only to voters on lists of citizens.

Legal challenges argued that the move violated states' constitutional rights to run elections.

Justice Kavanaugh wrote in the opinion that there was "at least a fair prospect that the final rule falls within the Postal Service's statutory authority". But he argued that "applying the rule in the 2026 elections would be arbitrary and capricious".

Justices Samuel Alito and Clarence Thomas, additionally conservatives, dissented. They wrote that the challenge to Trump's order was a "Hail Mary pass" that was unlikely to be successful ultimately.

"The Postal Service has broad authority to regulate the mail, " they continued. Trump signs executive order attempting to change mail-in voting. Supreme Court allows late-arriving mail-in ballots in defeat for Trump. The White House did not immediately comment on the decision.

Since returning to the White House, Trump has sought to restrict voting by mail. While he himself has voted by post, he has long asserted this method allows non-citizens to cast ballots and is prone to fraud.

In March's executive order, the president directed USPS to introduce unique barcodes on postal ballot envelopes.

State and local election authorities would additionally be required to supply information to an online portal regarding voters who receive mail ballots. Twenty-three states and Washington DC sued to stop Trump's order.

Meanwhile, the postal workers' union additionally stated clerks could not be trained in time for the election.

In court filings, the Trump administration maintained the new USPS rules were constitutional.

It remarked states "cannot choose to use the federal mails to carry out their elections but then insist that their election-related mail is somehow exempt from the Postal Service's rule-making authority, conferred by Congress".

Boston-based Judge Indira Talwani imposed an injunction on 4 September blocking Trump's order. She ruled that implementing the measures close to November's elections could disenfranchise voters.

Last week, a US appeals court refused to put Judge Talwani's order on hold.

On Sunday, another federal judge, Judge Carl Nichols, ruled against Trump's order.

Some states have already begun distributing mail-in ballots ahead of the midterm elections. It will decide which party controls Congress.

It is not the first setback on postal ballots for Trump before the Supreme Court.

In June, the justices ruled that states may count ballots postmarked by election day, rejecting the Trump administration's push to block votes being tallied when they are received after polls close.

Taken together, the developments around supreme Court blocks Trump' s plan to restrict mail point to a situation that is still moving, and the coming days should bring more clarity.