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.

Harvard on Thursday added Donald Trump’s proclamation barring new foreign students at the university from entering the United States to existing legal action against the administration, which it accuses of “retaliation” action.

Harvard has two lawsuits against the administration: one challenging its move to bar Harvard from accepting international students, and the other seeking to restore about $3 billion in federal grants that were abruptly slashed last month.