It didn’t take Rocio long to figure out why people were coming in and out of her new neighbor’s house. This woman, who asked to be identified only by her first name, lives in a row home on a block of Philadelphia’s Kensington neighborhood. For the past two years, she has kept her children indoors to play. "They don’t play outside because of the fear that something bad would happen," she explained in Spanish. "All of the time, people are coming to knock on the door of my neighbor’s house to s." She has never called the police because she’s afraid her name will somehow come to the attention of Immigration and Customs Enforcement, known colloquially as ICE. Officials in New Orleans, Newark and Princeton, N.J., all have recently announced they will limit their collaboration with ICE.