US Supreme Court rejects Trump’s plans on postal ballots: Why it matters

The United States Supreme Court has rejected Donald Trump’s bid to restrict voting by mail ahead of the November midterm elections, in a setback to the US president’s efforts to change rules governing elections.

The ruling on Monday by the conservative supermajority court allows states to continue sending out mail ballots as they have done for years, dealing a blow to Trump’s plans to stop the ballots before the elections and halting possible last-minute legal actions as voting begins in some states.

Trump has repeatedly cast doubt on the security of mail-in voting, citing debunked claims of widespread election fraud associated with it. That is despite the president voting by mail himself, including during the 2024 election.

Mail ballots, in place for decades, have been found to increase voter turnout and currently account for a third of all votes cast in the US.

Here’s what we know about the legal challenge to overturn them:

Voting by post works by sending ballots to the homes of registered voters, who then mail them back before a deadline.

Eight states, several of them Democratic-leaning – California, Colorado, Hawaii, Nevada, Oregon, Utah, Vermont and Washington – as well as the District of Columbia, allow all elections to be conducted entirely by mail.

Although there are cases of forgery or repeat voting, they are rare and amount to just four in 10 million mailed votes, according to the Brookings Institution.