By Nate Raymond, Steve Gorman and Daniel Wiessner BOSTON (Reuters) -A federal judge in Boston on Thursday temporarily blocked U.S. President Donald Trump from barring U.S. entry of foreign nationals seeking to study or participate in exchange programs at Harvard University.

On Wednesday, President Donald Trump signed a directive seeking to block U.S. entry for Harvard’s international students. It marked the administration’s latest effort to squeeze Harvard’s foreign enrollment after a federal judge in Boston blocked the withdrawal of its certification to host students from overseas.

University files an amended complaint to a pending lawsuit in federal court amid an ongoing struggle between the nation’s president and the elite college.