Could a 'national emergency' allow Trump to build wall?
Clip: 01/07/2019 | 7m 17s
President Trump has threatened to use executive power to declare a national emergency at the U.S.-Mexico border and obtain funds for a border wall without approval from Congress. But would such a dramatic move be legal? William Brangham asks Elizabeth Goitein of NYU’s Brennan Center for Justice how a national emergency is defined and what powers become available after one is declared.
Aired: 01/07/19Video has closed captioning.