Open this photo in gallery: From left, Harvard President Claudine Gay, University of Pennsylvania President Liz Magill, and Massachusetts Institute of Technology, President Sally Kornbluth listen during a hearing of the House Committee on Education on Capitol Hill, on, Dec. 5, in Washington.Mark Schiefelbein/The Associated Press Harvard University’s president apologized as pressure mounted for the University of Pennsylvania’s president to resign over their testimony at a congressional hearing on antisemitism that critics from the White House on down say failed to show that they would stand up to antisemitism on campus. In an interview Thursday with The Crimson student newspaper,...