A member of the Democratic Party, he has served as Director of the Office of Management and Budget, from May 21, 1998 to January 19, 2001, and again from November 18, 2010 to January 27, 2012, White House Chief of Staff, from January 27, 2012 to January 20, 2013, and U.S. Secretary of the Treasury, from February 28, 2013 to January 20, 2017.