Open this photo in gallery: Almost 6,800 international students attended Harvard in its most recent school year, making up about 27% of the student population.Charles Krupa/The Associated Press A federal judge said on Monday that she would issue a brief extension of an order temporarily blocking President Donald Trump’s plan to bar foreign nationals from entering the U.S. to study at Harvard University while she decides whether to issue a longer-term injunction. U.S. District Judge Allison Burroughs, at the end of a hearing in Boston in Harvard’s legal challenge to the restrictions, extended to June 23 a temporary restraining order...