When President Enrique Peña Nieto of Mexico was still a governor, he ordered a crackdown on protesters that led to the brutal sexual assault of dozens of women. The victims took their case to international human rights officials, who are now demanding an investigation across the entire chain of command in Mexico. That would probably mean investigating the president, Mr. Peña Nieto. These are the 11 plaintiffs, and their words. “I made the conscious decision to survive, to b