President Donald Trump rubbed salt on the wound of his recent Harvard student ban by claiming a “lot of them” can’t even do basic math. His petty comment came a day after he moved to bar foreign students from enrollment as part of his ongoing feud with the Ivy League school.

The Trump administration is trying to strip Harvard of its ability to enroll international students — an effort blocked by a federal judge on Friday, just hours after the university filed a lawsuit claiming Trump was violating its First Amendment rights.

After months of political and legal contention between the nation’s oldest Ivy League school and the Trump administration, President Donald Trump announced on Thursday a ban on Harvard’s enrollment of international students — affecting 6,