In a stunning move, President Donald Trump has nominated Republican Congresswoman Elise Stefanik to be the next U.S. ambassador to the United Nations. The 36-year-old New Yorker, who has served in the House of Representatives since 2015, is known for her outspoken support of the president and her tough stance on immigration and foreign policy. If confirmed by the Senate, Stefanik would replace Nikki Haley, who resigned from the post in October 2018.