President Donald Trump’s executive order seeking broad changes to how elections are run in the U.S. is vast in scope and holds the potential to reorder the voting landscape across the country, even as it faces almost certain litigation.

US President Donald Trump has signed an executive order that aims to overhaul US federal elections, including by requiring voters to show proof of citizenship and limiting when states can receive mail-in ballots.

The order is expected to face challenges in court by civil rights groups, which argue it will disenfranchise millions of voters.