ICE is vastly expanding its enforcement powers by deputizing local police officers. Many of those picked up during traffic stops have no violent criminal record.Chelsea White and her husband were driving home from cleaning office buildings one May evening when they happened upon a Tennessee Highway Patrol checkpoint. It was a situation the couple feared — and had taken precautions to avoid. White rolled down the driver’s side window on the Ford Fusion with their company’s logo. She drove because her husband, Hilario Martínez García, 46, is undocumented and cannot obtain a license in Tennessee. One of the officers looked...