A federal judge on Friday blocked President Donald Trump’s administration from enforcing most of his executive order on elections against the vote-by-mail states Washington and Oregon, in the latest blow to Trump’s efforts to require documentary proof of citizenship to vote and to require that all ballots be received by Election Day. U.S. District Judge John H. Chun found that those requirements exceeded the president’s authority, following similar rulings in a Massachusetts case brought by 19 states and in a Washington, D.C., case by Democratic and civil rights groups.