Trump signs executive order on mail-in voting, citing 'cheating' concerns

US President Donald Trump on Tuesday signed an executive order aimed at tightening rules for mail-in ballots, claiming it will curb what he described as widespread fraud in US elections.

"The cheating on mail-in voting is legendary. It's horrible what's going on, and it's very clearly covered very, very clearly. So I think this will help a lot with elections," Trump told reporters at the White House, describing the measure as "foolproof".

"We want to have honest voting in our country," he added, while renewing calls for voter ID and proof of citizenship.

Legal experts note that US states have primary authority over administering elections, and questions remain about the federal government's ability to enforce such changes. The order is expected to face legal challenges.

Trump acknowledged the measure could face legal challenges, saying it may be contested by "a rogue judge" but added he does not see how it can be challenged.

Trump has repeatedly alleged fraud in mail-in voting since the 2020 election, claims widely rejected by courts and election officials.