The US Supreme Court has cleared the way for Donald Trump's executive order on postal voting to move forward ahead of the upcoming midterm elections, handing the White House an emergency victory.

The ruling from the court's conservative majority does not decide whether the president's directive is lawful. Instead, the justices ruled on procedural grounds, concluding that the 23 states and the District of Columbia challenging the policy lacked the legal standing to bring their lawsuit at this stage.

Writing in an unsigned order, the conservative majority emphasised that further legal battles remain likely: "The Court's disposition of this application does not mean that any measure taken by the Government to implement the Order will necessarily be lawful. On that score, time will tell." The three liberal-leaning justices dissented.

The executive order, signed by Mr Trump in March, directs his administration to compile lists of eligible voters and instructs the US Postal Service to deliver postal ballots exclusively to individuals named on those lists.

The White House welcomed the outcome. Spokeswoman Lauren Bid told the Daily Mail that the decision was "a major win for the security of American elections", adding: "These are commonsense measures that protect the security of mail-in ballots and ensure only Americans are electing American leaders. This Administration will continue to lawfully enact the agenda President Trump was elected on – which includes the safety and security of our elections."

Democratic officials from the 23 states and Washington DC, backed by dozens of local election administrators, had urged the justices to keep the policy frozen while preparations for the vote were already underway. They argued that the US Constitution assigns election authority to states and Congress, warning in court filings that "the consequences of allowing such transformative changes to take effect so close to this fall's elections would be extreme."

The emergency appeal reached the Supreme Court after a federal judge in Massachusetts placed a nationwide hold on the directive, a decision subsequently upheld on appeal. The Justice Department appealed in late July, pointing to a conflicting ruling in Washington that had allowed the order to advance and arguing the injunction obstructed "the government's ability to finalize and implement the President's proposed policies to promote election integrity." A coalition of 12 Republican-led states supported the federal appeal, arguing that states would retain input on the voter lists.

Postal voting has long been a recurring target for Mr Trump, who has repeatedly claimed it facilitates widespread fraud despite extensive evidence to the contrary and his own regular use of postal ballots. He has also attributed his 2020 election loss to mail voting without credible evidence. While Mr Trump has framed the directive as a safeguard against non-citizen voting, documented instances of non-citizens casting ballots remain extremely rare and constitute a federal felony.

Practical hurdles remain significant. The US Postal Service outlined its implementation plan last week, but several states are due to begin dispatching ballots in just a few weeks. The decision also contrasts with a ruling in June, when the Supreme Court determined on its full docket that states could count ballots arriving after Election Day.

As the justices noted, this ruling does not prevent fresh lawsuits once implementation starts, and several related challenges are already making their way through the courts. I will continue to track these legal developments closely as the midterm elections draw near.