Papers of the American author, educator, specialist in American studies, political consultant. Collection includes correspondence, writings, and papers relating to the "Draft Stevenson" movement of the 1960 U.S. Presidential campaign. Correspondents include Averell Harriman, Clinton Rossiter, Arthur Schlesinger Jr., and Adlai Stevenson. Writings include addresses, radio speeches, and short pieces for and about Stevenson. Also three scrapbooks of clippings on Stevenson.

Papers of the American military officer. Powers was Assistant Chief of Operations, U.S. Strategic Air Forces, 1945; Assistant Task Force Commander for Air Operation Crossroads, Bikini Atoll, 1946; Vice-Commander of the Strategic Air Command, 1948-1954; Commander of the Air Research and Development Command, 1954-1957; and Commander-in-Chief of the Strategic Air Command, 1957-1964. Collection includes communications and writings (1945-1970), correspondence (1945-1970), memorabilia (1934-1970), and organizational records (1928-1969), mostly pertaining to the American Security Council. Notable correspondents include William F. Buckley, Lucius D. Clay, Carl T. Curtis, Donald W. Douglas, Ira Eaker, Joe Foss, Arthur Godfrey, Barry Goldwater, Roman L. Hruska, William R. Kintner, Curtis LeMay, Lyman L. Lemnitzer, Robert S. McNamara, Richard M. Nixon, Ronald Reagan, Francis Spellman, Lawrence Spivak, Stuart Symington, Lowell Thomas, Harry S. Truman, Nathan Twining, DeWitt Wallace, and Thomas D. White, among others.