In a turn of events that has drawn international scrutiny and domestic legal resistance, U.S. President Donald Trump has made contradictory statements about international students, welcoming them in principle but signing an executive order that effectively blocks many from attending Harvard University.

President Donald Trump has escalated his standoff with Harvard University, seeking another path to prevent international students from attending the school after a judge blocked an attempt to revoke Harvard’s ability to enroll international students.

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.