A 2012 guide shows who's eligible for Deferred Action for Childhood Arrivals, or DACA. The original program, implemented by President Obama in 2012, has come under fire from many Republican presidential candidates — many of whom have promised to end it if elected to the White House. Damian Dovarganes/AP hide caption
President Obama speaks about immigration reform during a meeting with young immigrants in the White House on Feb. 4. The president's 2014 executive actions on immigration have been caught up in a legal dispute, which the White House has appealed to the Supreme Court. Saul Loeb/AFP/Getty Images hide caption
Wilfredis Ayala, an unauthorized immigrant from El Salvador, lives on Long Island, N.Y., with his U.S.-born son, Justin, and Justin's mother, Wendy Urbina. Hansi Lo Wang/NPR hide caption
People walk along the beach in Tijuana, Mexico, near San Diego, where metal bars marking the border with the U.S. meet the sea. Gregory Bull/AP hide caption