FILE - In this Nov. 25, 2018, file photo, migrants run from tear gas launched by U.S. agents, amid photojournalists covering the Mexico-U.S. border, after a group of migrants got past Mexican police at the Chaparral crossing in Tijuana, Mexico. Children torn from their parents, refugees turned away, tear gas fired on asylum-seekers, and a swath of the globe derided by the president in crude language. In a breathless 2018, they were just a handful of headlines on immigration, one of the year's most dominant issues. (AP Photo/Rodrigo Abd, File)
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