Philadelphia City Councilwoman Maria Quinones-Sanchez pushed for the city to change its practice of detaining immigrants on behalf of federal officials. Matt Rourke/AP hide caption

itoggle caption Matt Rourke/AP

Young migrants seen apprehended by the Border Patrol near the Rio Grande in Hidalgo, TX, earlier this year. The next stop for many is either a detention center or deportation. Kainaz Amaria/NPR hide caption

itoggle caption Kainaz Amaria/NPR

Daniel Neyoy Ruiz, 36, moved into a Tucson church with his family last month, claiming sanctuary as he sought a reversal in his deportation order. Fernanda Echavarri/Arizona Public Media hide caption

itoggle caption Fernanda Echavarri/Arizona Public Media

A migrant from El Salvador holds a map he received from church workers at the Mexico-Guatemala border. It shows the freight train schedules and routes to the U.S. border. Carrie Kahn/NPR hide caption

itoggle caption Carrie Kahn/NPR