The vetting will go beyond student applicants and includes faculty, employees, contractors, guest speakers and tourists, according to the cable seen by NBC News.

Trump’s comments come after a federal judge blocked the Trump administration's effort to bar the university from enrolling international students.

Trump has been targeting Harvard for months, saying that the school had fostered liberal ideals and antisemitism. Harvard has argued in its lawsuit that the administration has violated the First Amendment through its targeting of international students. O’Leary jabbed the administration over its behavior toward Harvard on Friday.

The Trump administration is seeking to end all contracts it has with Harvard University, a move that adds to the strain between the federal government and America's researchers.

A federal judge plans to issue a preliminary injunction blocking the Trump administration from halting Harvard's ability to enroll foreign students.

A federal judge has extended an injunction on the Trump Administration's attempt to halt Harvard's student visa program.

Mehmet Oz, the administrator for the Centers for Medicare and Medicaid Services, spoke with POLITICO White House Bureau Chief Dasha Burns on Trump’s recent efforts to ban foreign students.

For one view on President Trump’s trade wars and his battle against Harvard, Amna Nawaz spoke with Kevin O’Leary, a businessman, celebrity investor and a regular on the show “Shark Tank” where he is known as Mr.