Joseph Keith Kellogg is a former United States government official and a retired lieutenant general in the United States Army. He previously served as the National Security Advisor to Vice President Mike Pence, and as the Executive Secretary and Chief of Staff of the United States National Security Council in the Trump administration. He served as National Security Advisor on an acting basis following the resignation of Michael T. Flynn. Learn more about your ad choices. Visit megaphone.fm/adchoices