United States Vice President-elect Kamala Harris has named Nancy McEldowney, a former US ambassador to Bulgaria, as her national security adviser. United States Vice President-elect Kamala Harris has named Nancy McEldowney, a former US ambassador to Bulgaria, as her national security adviser. McEldowney served for over 30 years in the US Foreign Service, including as ambassador to Bulgaria, from August 2008 to July 2009, and as Chargé d’Affaires and Deputy Chief of Mission in Turkey