The decision is a setback for President Donald Trump, who has argued the requirement is needed to restore public confidence in elections. But the judge allowed other parts of Trump’s sweeping executive order on U.S. elections to go forward for now, including a directive to tighten mail ballot deadlines around the country.

A U.S. judge on Thursday blocked parts of President Donald Trump's executive order seeking to impose new rules on federal elections, which Democrats and other groups said risked denying eligible citizens the right to vote.