Nemat Shafik, the president of Columbia University, will face a group of House Republicans on Wednesday who have accused the school of allowing a pervasive pattern of antisemitic assaults, harassment and vandalism on campus since the Oct. 7 Hamas attack in Israel. Columbia and Dr. Shafik have had months to prepare for this hearing, and they know in advance the line of questioning they will face. Four months ago, the same congressional committee questioned the presidents of Harvard, the University of Pennsylvania and M.I.T. about similar allegations. After that hearing, the presidents of the University of Pennsylvania and Harvard stepped...