A group of New York University professors angry over president John Sexton's stewardship of the school is calling on one of Sexton's chief defenders, Wachtell, Lipton, Rosen & Katz founding partner Martin Lipton, to resign from his position as chair of NYU's board of trustees.

NYU Faculty Against the Sexton Plan (FASP), a group that claims to represent more than 400 of NYU's faculty opposed to what they say is Sexton's push to expand the university at home and abroad on the backs of debt-saddled students and underpaid staffers, demanded that Lipton step down from the post that he has held for a decade and a half in a lengthy open letter released Tuesday. The university says it has 4,000 faculty members.