A prominent tenured professor at Northwestern says she’s been banned from campus—a move she says is retaliation for her activism. Professor Jacqueline Stevens is a scholar focused on private prisons, deportations and militarism. She has criticized U.S. universities’ increasing ties to the military-industrial complex. In a 2015 article last year, she criticized her own university, Northwestern, for its corporate ties. She also led a successful campaign to block retired U.S. Army Lt. Gen. Karl Eikenberry from being named the head of one of Northwestern’s research centers. Northwestern has so far refused to comment on the ban.