Henry Fonda

Character: William Russell

Cliff Robertson

Character: Joe Cantwell

Edie Adams

Character: Mabel Cantwell

Margaret Leighton

Character: Alice Russell

Shelley Berman

Character: Sheldon Bascomb

Lee Tracy

Character: President Art Hockstader

Ann Sothern

Character: Sue Ellen Gamadge

Gene Raymond

Character: Don Cantwell

Kevin McCarthy

Character: Dick Jensen

Mahalia Jackson

Character: Mahalia Jackson

Howard K. Smith

Character: Howard K. Smith

John Henry Faulk

Character: Gov. T.T. Claypoole

Richard Arlen

Character: Sen. Oscar Anderson

Penny Singleton

Character: Mrs. Claypoole (scenes deleted)

George Kirgo

Character: Speechwriter

George Furth

Character: Tom

Anne Newman Bacal

Character: Janet (as Anne Newman)

Mary Lawrence

Character: Mrs. Merwin

H.E. West

Character: Sen. Lazarus

Michael MacDonald

Character: Zealot

William R. Ebersol

Character: Gov. John Merwin

Natalie Masters

Character: Mrs. Anderson

Marie Blake

Character: Cleaning Woman (as Blossom Rock)

Bill Stout

Character: Bill Stout

Tyler McVey

Character: Chairman

Sherwood Keith

Character: Doctor

Leoda Richards

Character: Convention Attendee (uncredited)

Gore Vidal

Character: Delegate (uncredited)

John Alban

Character: Banquet Guest (uncredited)

Fred Aldrich

Character: Delegate (uncredited)

Leon Alton

Character: Russell Supporter (uncredited)

David Armstrong

Character: Russell Campaign Worker (uncredited)

Billy Beck

Character: Party Guest (uncredited)

George Bruggeman

Character: Reporter (uncredited)

Donald Chaffin

Character: Supporter (uncredited)

Dick Cherney

Character: Reporter (uncredited)

Noble 'Kid' Chissell

Character: Man at Pool (uncredited)

Rupert Crosse

Character: Reporter (uncredited)

Jack Daly

Character: Photographer (uncredited)

George DeNormand

Character: Cantwell Supporter (uncredited)

Kenneth Gibson

Character: Reporter (uncredited)

Herschel Graham

Character: Campaign Worker (uncredited)

Sam Harris

Character: Cantwell Supporter (uncredited)