AdvertisementDespite 'Ample Warning,' U.S. Was Unprepared For Latest Surge Of Migrant ChildrenMarch 22, 2021Joel RosefacebookEmailHomeland Security Secretary Alejandro Mayorkas addresses a press briefing this month. Mayorkas has tried to discourage migrants from coming north and blamed the Trump administration for dismantling the system that processes and cares for them. (AP)