The Trump administration has bulldozed rules that might slow construction of a wall promised by President Trumprnon the U.S.-Mexico border.rnIn a Federal Register notice posted last week, acting Homeland Security Secretary Elaine Duke said thernadministration would waive 28 environmental regulations to spur work on a wall near Calexico, Calif.rnAmong the waived rules are mainstays of federal environmental oversight: the National Environmental
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