U.S. Ambassador to Nigeria [r]: Robin Renèe Sanders, a Foreign Service Officer, has served both as Ambassador to Nigeria and U.S. Permanent Representative to the Economic Community of West African States (ECOWAS) since 2007; a democracy promotion specialist, she previously was Deputy Commandant and International Affairs Adviser at the Industrial College of the Armed Forces; U.S. Ambassador to the Republic of Congo (2002-2005); Director for Public Diplomacy for Africa for the State Department (2000-2002); twice as the Director for Africa at the National Security Council at the White House (under Presidents Bush in 1989 and Clinton from 1997-1999); [e]