Harvard University posed a legal challenge to President Donald Trump on Thursday to block visas for foreign students planning to attend Ivy League College.

“Chicking our institutions is because their admissions to international students and their collaboration with other educational institutions around the world is another illegal step in the government’s retaliation against Harvard,” Harvard President Alan M. Garber said in a letter to the campus community.

Trump announced Wednesday that he refused to sign a visa and they planned to enter the United States to study at Harvard University, his latest attack on famous universities.

The move comes late last month after attempts to limit Harvard’s ability to limit its admission by revoking its certificates in the Student and Communication Visitor Program, which was temporarily blocked by a federal judge.

Harber wrote in the letter that Harvard has amended the federal complaint and will seek a court to "immediately stop the execution of the announcement."

"We hope the court can act quickly," he wrote.

Trump's announcement will not affect only new students. It said the State Department will review existing foreign students at Harvard University under the F, M or J visa to determine whether their visas should be revoked.

Harvard said Wednesday's announcement and previous attempts by the Department of Homeland Security to revoke its enrollment capacity violated its First Amendment rights, Harvard said in an amended complaint.

“Everyone is part of the government’s clear retaliation campaign against Harvard’s exercise of its First Amendment rights to reject the government’s demand for “ideology” to control Harvard’s governance, curriculum and faculty and students,” the amendment’s complaint.

"In addition, there is no legal basis for government actions," it wrote.

Harvard's amended complaint argues that Trump's immigration law allows the president to ban "a type of foreigner whose class will "damage the interests of the United States" - and Trump's announcement does not suspend the entry of classes, but people who want to attend Harvard.

It argues: “The president’s actions are not to protect the interests of the United States, but to pursue government hatred against Harvard.”

Trump and his administration targeted Harvard’s targets and claimed that it did not do enough to combat anti-Semitism on campus during demonstrations against the Israel-Hamas War.

Harvard rejected Trump administration’s request in April, which included the view of auditing student groups. In response, the federal government said it has frozen over $2 billion in federal grants.

Garber wrote in his letter Thursday that it will defend its international students.

In the revised complaint, Harvard said the attempts against international students have harmed all students because Harvard is “ready to contribute and lead to our global society.”

“International students and scholars have made outstanding contributions inside and outside our classrooms and laboratories to fulfill our mission of excellence in countless ways,” Garber wrote. “As we continue to assert constitutional rights, we will celebrate them, support them and defend their interests.”