Retired Marine Corps officer who served as National Security Advisor to Ronald Reagan from 1983-1985. Was a leading architect of the Strategic Defense Initiative (SDI). Pleaded guilty to charges related to the Iran-Contra affair

U.S. Secretary of Veterans Affairs (2009-present)

U.S. Ambassador to the Kyrgyz Republic (2005-08); U.S. Ambassador to Armenia (2008-present); Former Ambassador to Ukraine- testified as witness in President Trump's impeachment