Florida’s “hanging chads” ballot controversy riveted the nation during the 2000 presidential contest and later prompted Congress to create an independent commission to help states update their voting equipment.

The blocked portion of the order would have changed the federal voter registration form to indicate proof of citizenship is required.

U.S. District Judge Colleen Kollar-Kotelly ruled that the Trump administration cannot enforce parts of the order requiring federal election officials to assess whether people who are registering to vote are citizens.