Judge Colleen Kollar-Kotelly blocked parts of the executive order adding a proof-of-citizenship requirement to the national voter registration form.

President Donald Trump's administration was just handed another stinging loss in court. This time, his defeat came at the hands of a Republican-appointed judge who openly challenged the administration's regard for the Constitution.

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.