Richard Bruce Cheney is an American politician and businessman who served as the 46th vice president of the United States from 2001 to 2009 under President George W. Bush. Often cited as the most powerful vice president in American history, Cheney previously served as White House Chief of Staff for President Gerald Ford, the U.S. representative for Wyoming's at-large congressional district from 1979 to 1989, and as the 17th United States secretary of defense in the administration of President George H. W. Bush. He is the oldest living former U.S. vice president, following the death of Walter Mondale in 2021.