President Donald Trump is moving to block nearly all foreign students from entering the country to attend Harvard University, his latest attempt to choke the Ivy League school from an international pipeline that accounts for a quarter of the student body.

Harvard University on Thursday filed a legal challenge to President Donald Trump’s efforts to block visas for foreign students planning to attend the Ivy League college.“Singling out our institution for its enrollment of international students and its collaboration with other educational institutions around the world is yet another illegal step taken by the Administration to retaliate against Harvard,