Despite only being in effect for a single day, President Donald Trump’s proclamation barring Harvard's international students from entering the U.S. has had a serious, lasting negative impact, the university says.

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 isn’t considering opening a foreign campus to counteract President Donald Trump’s push to block the enrollment of international students, despite an invitation from a top German culture official.