 There's the pledge to enact the largest ever deportation operation in American history that's central to his stump speeches. He said that would require help from local police and the National Guard. There's also the suggestion to bring back a travel ban for Muslim-majority countries he pushed during his first year in office, and an aggressive plan to use the military to secure the U.S.-Mexico border. That's NPR's Stephen Fowler reporting. This is NPR News from Washington.