Washington DC - President Donald Trump recently took another hit to his plans to drastically change mail-in voting ahead of the November midterm elections.

On Sunday evening, US District Judge Carl Nichols issued a preliminary injunction blocking the US Postal Service (USPS) from implementing the rules of an executive order Trump signed in March to limit mail-in voting.

"Plaintiffs have demonstrated that, absent an injunction, there is an increased risk that a significant number of otherwise appropriate absentee or mail-in ballots will ultimately not be counted in the upcoming elections," Judge Nichols wrote.

"The public has a strong interest in ensuring that doesn't happen," he added.

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Trump has long claimed, without evidence, that US voting is rife with fraud and that Democrats use means like mail-in voting to cheat.

With the midterms quickly approaching, and as Republicans are struggling to maintain their holds on the House and Senate, Trump and his allies have pushed desperate efforts to ensure they come out on top.

The executive order would require the compilation of lists of eligible voters and for the USPS to deliver ballots only to voters who are on the lists.

Judge Nichols' ruling was similar to one issued last month by US District Court Judge Indira Talwani, who argued the plan could lead to "disenfranchisement of millions of United States citizens who seek to vote by mail."

President Trump and his administration have appealed all opposing rulings and recently asked the US Supreme Court to step in and overturn the freezes.