President Donald Trump's 2020 budget proposal seeks $8.6 billion in funding for the U.S.-Mexico border wall. John Burnett, NPR's Southwest Correspondent, discusses just what's happening at the border, families separated, and the impact of Trump's "zero tolerance" immigration policies. "There is no U.S. representative on the U.S.-Mexico border who is in favor of this border wall, Democrats or Republicans; all the way from San Diego to Brownsville, Texas," Burnett said.