Harvard sued and asked for a restraining order less than 24 hours after the Trump administration had said it would block current and future international students from attending the university.

BRUSSELS (AP) — Belgium’s Royal Palace said Friday that Princess Elisabeth, who is first in line to the throne, is waiting to find out whether she can return to Harvard for her second year after U.S. President Donald Trump announced a ban on foreign students at the university.

A federal judge has blocked a Trump administration decision to revoke Harvard University’s ability to enroll international students.

Harvard and the federal government are locked in a battle that boils down to turning over records on international students. But Harvard says it is also about the First Amendment.

Harvard University sued the Trump administration on Friday after having its ability to host foreign students revoked. The move marked the latest escalation in the ongoing back-and-forth between the president and one of the nation’s most prestigious universities.

Live updates and the latest news as Trump seeks to boost nuclear energy; judge blocks administration from barring Harvard international students

The court battle over Harvard's foreign students tests both the legality of the White House's tactics and the judicial system’s ability to rein in alleged government overreach.

President Donald Trump took a dig at the prestigious Harvard University for recently introducing an introductory to math course to address issues among students with foundational algebra skills. He went on to claim that some students at the elite University can't even do remedial math and can't add 2+2.