See Candidate Page Elizabeth Warren, Climate, Iowa, National Security Warren in Iowa 1/19/20 At a high school in Des Moines, a teacher asks @ewarren to name the biggest foreign policy threat and gives her these choices:ChinaIranNorth KoreaRussiaHer answer: “Can I add a 5th? Climate.” pic.twitter.com/v9vJwbz4t8— David Catanese (@davecatanese) January 19, 2020