ITHACA, NY (607NewsNow) – A labor union at Cornell is asking the school’s president to step down.

On May 5, Cornell Graduate Students United (CGSU-UE) Local 300 publicly called for the resignation of President Michael Kotlikoff on social media.

It follows an incident after a protest on April 30 in which Kotlikoff claims he was harassed and intimidated by demonstrators, and students claim he backed into them with his car.

Cornell has released a video of the incident, available here.

CGSU says Kotlikoff’s actions demonstrate a “concerning lack of leadership.”