Stewart Lee Udall (January 31, 1920 – March 20, 2010) was an American politician and later, a federal government official who belonged to the Democratic Party. After serving three terms as a congressman from Arizona, he served as Secretary of the Interior from 1961 to 1969, under presidents John F. Kennedy and Lyndon B. Johnson. A staunch liberal, he is best known for enthusiastically promoting environmentalism while in the cabinet, with success primarily under President Johnson.
