Harvard’s leadership has asked a court to stop the Trump administration’s latest attempt to block international students — over a fourth of its student body — from coming to the university, according to a new court filing less than 24 hours after the latest move by President Donald Trump against the 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.

The president had issued a proclamation targeting international students who seek to enroll at Harvard. The moves escalated a legal battle between the two parties.