President Trump spoke to reporters from Air Force One Sunday night, answering questions from the national security advisor to an offer to send troops to Mexico to fight cartels.

U.S. President Donald Trump said on Sunday that Stephen Miller, his deputy chief of staff, was a frontrunner to be potentially named as national security adviser following the departure of Mike Waltz.

National security adviser Mike Waltz is leaving his White House post, although soon after reports about his departure were published, President Trump announced he plans to nominate him to be ambassador to the United Nations.