The papers of Donald J. Mitchell are composed of six linear feet of correspondence, subject files, campaign memorabilia, and some material on the Knights of Columbus. The papers date from 1942 to 1968 and consist primarily of correspondence. Included are letters from such prominent figures as: John M. Bailey, Fred Biermann, Chester Bowles, Paul Butler, Steven Carter, Merwin Coad, Rudolph M. Evans, S.J. Galvin, Guy M. Gillette, John R. Hansen, Averell Harriman, Lex Hawkins, Clyde E. Herring, Mike Hogan, Harold E. Hughes, Hubert H. Humphrey, Estes Kefauver, Alberta Metcalf Kelly, John F. Kennedy, Dale Kramer, Herschel C. Loveless, Edward A. McDermott, Edward J. McManus, Jake More, Donald A. Norberg, Clark Rasmussen, Arthur Sanford, Neal Smith, Adlai Stevenson, Stuart Symington, Otha D. Wearin, Lumond F. Wilcox, G. Mennen Williams, and Leonard Wolf. The subject files relate to Democratic politics with folders about national and state conventions, committee reports, county quotas, and specific Congressional races.