US President Donald Trump has called for a 15 percent cap on foreign students at Harvard University, citing national security concerns and claiming many are influenced by “radical left” elements, according to BBC.

“Harvard must show us their lists,” Trump said, criticizing the current 31 percent international student rate and arguing it limits opportunities for US students.

The Trump administration has urged institutions to end diversity programs and combat antisemitism or face funding cuts. Under tremendous federal pressure, Harvard has had billions of dollars in financing frozen and its student visa eligibility withdrawn, a move that has been temporarily delayed by a federal judge, BBC reported.

Harvard reports that 27 percent of its students are international, primarily in graduate programs.