Open this photo in gallery: A U.S. judge ruled against the Trump administration's effort to block foreign students from enrolling at Harvard based on national security concerns.Charles Krupa/The Associated Press A federal judge on Monday blocked President Donald Trump’s administration from implementing his plan to bar foreign nationals from entering the United States to study at Harvard University. U.S. District Judge Allison Burroughs in Boston issued an injunction barring Trump’s administration from carrying out its latest bid to curtail Harvard’s ability to host international students amid an escalating fight pitting the Republican president against the prestigious Ivy League school. The...