“Harvard University covered up a high-level investigation into whether its controversial president was a plagiarist — and used an expensive law firm to threaten The Post over our own probe.

The college announced Tuesday morning that it had investigated Claudine Gay over whether some of her academic work was plagiarized and had cleared her of breaching the college’s ‘standards for research misconduct.’

Instead, it said that she would request four corrections in two publications to insert citations and quotation marks that were originally “omitted.”

But The Post can disclose that Harvard spent weeks failing to come clean about Gay being under investigation — staying quiet even when she was hauled in front of Congress for disastrous testimony on how the Ivy League college is dealing with antisemitism on campus.

Harvard only disclosed the investigation when the university’s governing body, Harvard Corporation, said it unanimously stood behind her despite a firestorm of criticism for her evidence to Congress.”