Nauert has been on the short list for ambassador to the U.N. since Haley announced that she was stepping down from her post in October. Formerly a Fox News anchor, sh came to the administration in 2017. She will have to be confirmed by the Senate to become ambassador to the U.N.
Nauert's appointment was first reported by Bloomberg.
Although some have speculated that Haley may challenge Mr. Trump in 2020, Haley has said that she will support the president.