Trump has signed an executive order requiring documentary proof of citizenship to register to vote in federal elections and mandating that all ballots be received by Election Day.

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.

President Donald Trump signed an executive order Tuesday outlining sweeping changes to the way federal elections are carried out nationwide, a responsibility the Constitution explicitly assigns to the states and Congress.