Fear of deportation is reshaping migrant behavior in the United States, where undocumented workers are scrambling to wire home as much money as they can—before they’re potentially forced to leave. The result: a remittance surge across Latin America that’s funneling billions of dollars from the U.S. into some of the region’s most fragile economies. “I’ve been sending more money back home because you never really know what could happen,” Kevin M., an undocumented Ecuadorian restaurant worker in