A federal judge on Friday blocked President Donald Trump's administration from implementing parts of his sweeping executive order overhauling federal elections, including by requiring proof of U.S. citizenship to register to vote and barring states from counting mail-in ballots received after Election Day.

The ruling is the second legal setback for Trump’s election order. A federal judge in Washington, D.C., previously blocked parts of the directive, including the proof-of-citizenship requirement for the federal voter registration form.

A federal judge sided with a group of Democratic state attorneys general who challenged the effort as unconstitutional.