Castro in Iowa

Democrat Julian Castro promised a 9-year-old girl in Urbandale who asked him about climate change that his first executive order as president would be to sign the Paris Climate Accord. That, Castro said during an Urbandale house party on Friday, would ensure her generation has cleaner air and water.

Castro called climate change “the biggest threat we face in this country” and told the girl if it’s not fixed soon, “it may be that one day there is no United States of America.”