WASHINGTON: 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.

In an executive order signed Wednesday, Trump declared that it would jeopardize national security to allow Harvard to continue hosting foreign students on its campus in Cambridge, Massachusetts.

“I have determined that the entry of the class of foreign nationals described above is detrimental to the interests of the United States because, in my judgment, Harvard’s conduct has rendered it an unsuitable destination for foreign students and researchers,” Trump wrote in the order.