University of Pennsylvania President Elizabeth Magill, and the chairman of the board of trustees, Scott L. Bok, have both resigned after intense pressure from alumni, donors and members of Congress. Magill was hounded from office after a disastrous performance at a congressional hearing on antisemitism on American college campuses. At the hearing, New York Rep. Elise Stefanik bored in on Magill's equivocations, trying to elicit a clear response to a question about antisemitism. “Calling for the genocide of Jews,” Ms. Stefanik asked, “does that constitute bullying or harassment?” Ms. Magill replied, “If it is directed and severe, pervasive, it is...