A pregnant migrant climbs the border fence before jumping into the U.S. to San Diego, Calif., from Tijuana, Mexico, Thursday, Dec. 27, 2018. Discouraged by the long wait to apply for asylum through official ports of entry, many Central American migrants from recent caravans are choosing to cross the U.S. border wall and hand themselves into border patrol agents. (AP Photo/Daniel Ochoa de Olza)