Henry Fonda Robert Leffingwell
Charles Laughton Senator Seabright Cooley
Don Murray Senator Brigham Anderson
Walter Pidgeon Senate Majority Leader
Peter Lawford Senator Lafe Smith
Gene Tierney Dolly Harrison
Franchot Tone The President
Lew Ayres The Vice President
Burgess Meredith Herbert Gelman
Eddie Hodges Johnny Leffingwell
Paul Ford Senator Stanley Danta
George Grizzard Senator Fred van Ackerman
Inga Swenson Ellen Anderson
Frank Sinatra Self (voice)
Edward Andrews Senator Orrin Knox
Paul McGrath Hardiman Fletcher
Will Geer Senate Minority Leader
Betty White Senator Bessie Adams
Tom Helmore British Ambassador
Rene Paul French Ambassador
Paul Stevens Louis Newborn
Russ Brown Night Watchman Mike
Malcolm Atterbury Senator Tom August
Janet Jane Carty Pidge Anderson
Hilary Eaves Lady Maudulayne
Michele Montau Celestine Barre
J. Edward McKinley Senator Powell Hanson
Bill Quinn Senator Paul Hendershot
Tiki Santos Senator Kanaho
Raoul De Leon Senator Velez
Chet Stratton Rev. Carney Birch
Larry Tucker Manuel
Betty Murray Senator Lafe Smith's Girlfriend
John Granger Ray Shaff
Sid Gould Bartender
Meyer Davis Orchestra Conductor
Irv Kupcinet Journalist #1
Robert C. Wilson Journalist #2
Alan Emory Journalist #3
Jesse Stearns Buscher Journalist #4
Milton Berliner Journalist #5
Allan W. Cromley Journalist #6
William Knighton WHCA President
Guy M. Gillette Senator Harper
Henry Fountain Ashurst Senator McCafferty
Raj Mallick Indian Ambassador
Leon Alton Senator (uncredited)
Walter Bacon Senator (uncredited)
Joe Baird Senator (uncredited)
Eddie Baker Senator (uncredited)
Brandon Beach Senator (uncredited)
Mario Cimino Senator (uncredited)
Roger Clark Senator (uncredited)
Paul Cristo Senate Gallery Spectator (uncredited)
Harry Denny Senator (uncredited)
George DeNormand Senator (uncredited)
George Ford Senator (uncredited)
Cay Forester President's Secretary (uncredited)
Bobby Gilbert Senator (uncredited)
Polly Guggenheim Washington Socialite (uncredited)
Clive Halliday Senator (uncredited)
Helen Hardin Washington Socialite (uncredited)
Henry Jackson Drink Refuser (uncredited)
Virgil Johansen Senator (uncredited)
Kenner G. Kemp Senate Chamber Reporter (uncredited)
Joseph La Cava Senator (uncredited)
Evelyn Lincoln Washington Party Guest (uncredited)
Al McGranary Senator (uncredited)
William Meader Senator (uncredited)
Harold Miller Senate Official (uncredited)
Sol Murgi Senator (uncredited)
Norman Papson Gay Bar Patron (uncredited)
Charles Perry Senate Gallery Spectator (uncredited)
Paul Power Senator (uncredited)
Walter Reed Senate Staff Clerk (uncredited)
Leoda Richards Senator (uncredited)
Clark Ross Senator (uncredited)
John Roy Reporter (uncredited)
Carlisle Runge Washington Party Guest (uncredited)
Dick Ryan Senator (uncredited)
Jeffrey Sayre Senate Staff Clerk (uncredited)
Louis Scheyven Washington Party Guest (uncredited)
Bernard Sell Senator (uncredited)
Stephen Soldi Senate Gallery Spectator (uncredited)
Marion Lloyd Stearns White Washington Party Guest (uncredited)
Hal Taggart Senator (uncredited)
Wayne Tucker Journalist (uncredited)
Harty Wadsworth Washington Party Guest (uncredited)
Jerry Wadsworth Washington Party Guest (uncredited)
Byron White Washington Party Guest (uncredited)
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