U.S. President Donald Trump signed an executive order on Tuesday that would require voters to prove they are U.S. citizens and attempts to prevent states from counting mail-in ballots received after Election Day.

NEW YORK (AP) — President Donald Trump on Tuesday signed a sweeping executive action to overhaul elections in the U.S., including requiring documentary proof of citizenship to register to vote in federal elections and demanding that all ballots be received by Election Day.

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