The United States Supreme Court has given the green light to President Donald Trump's executive order limiting mail voting, despite concerns about its implementation before the upcoming midterm elections in November. The court's 6-3 conservative majority decision leaves room for further legal challenges, which may slow down the execution of the order. The US Postal Service had previously outlined how it would implement the changes, but time is running out to make significant alterations as some states are already mailing ballots to voters in a matter of weeks. The case centers around the President's claims that mail-in voting encourages fraud, despite evidence to the contrary and his own history of using this method. The dispute could lead to multiple election-related challenges before the justices, with the US Justice Department urging the high court to permit work on implementing the changes prior to the midterms. The executive order, signed in March, directs the administration to compile eligible voter lists and mandates that the US Postal Service deliver mail ballots only to those listed. Several states and the District of Columbia have filed lawsuits to block the order, arguing that the US Constitution grants states and Congress the power to manage elections, and Trump's alterations could lead to disorder and partisan exploitation. The consequences of implementing such transformative changes so close to the fall elections, according to lawyers for the states, would be severe. Several state and local election officials have urged the justices to halt the order while preparations for the elections are underway. A judge in Massachusetts previously blocked the plan for the midterm elections in those states, a decision upheld by an appeals court. The Trump administration has appealed to the Supreme Court on procedural grounds, arguing that the states filed their lawsuit prematurely and citing another ruling in Washington that allowed the order to proceed. An appeals court supported this decision, but left room for future legal action if the changes are implemented. Federal attorneys argue that the Massachusetts order obstructs the government's ability to finalize and implement the President's proposed policies aimed at ensuring election integrity for the November elections. A group of Republican-leaning states have also backed the federal government in their appeal before the high court, asserting that states would have input on the final voter lists. The Supreme Court has previously ruled against Trump-backed arguments regarding mail-in ballots, deciding in June that states can count ballots arriving after Election Day. This case was decided following full briefing and arguments, rather than on the court's emergency docket. Trump, who has made unfounded claims of widespread fraud in U.S. elections including his 2020 loss to Democrat Joe Biden, has advocated for the passage of the SAVE America Act by the Republican-controlled Congress, a contentious package of voting restrictions. He has also repeatedly pushed for legislation requiring proof of citizenship to vote, a practice shown to be rare and punishable by deportation. The use of mail ballots has grown in popularity among voters of both parties, with approximately 30% of all votes cast that way during the 2024 presidential election according to federal data. A study conducted by the Brookings Institution in 2025 found only about four cases of fraud out of every 10 million mail ballots cast.