James Stewart

Jefferson Smith

Jean Arthur

Clarissa Saunders

Claude Rains

Joseph Paine

Edward Arnold

Jim Taylor

Guy Kibbee

Governor Hopper

Thomas Mitchell

Diz Moore

Eugene Pallette

Chick McGann

Beulah Bondi

Ma Smith

H.B. Warner

Senate Majority Leader

Harry Carey

President of the Senate

Astrid Allwyn

Susan Paine

Ruth Donnelly

Emma Hopper

Grant Mitchell

Senator MacPherson

Porter Hall

Senator Monroe

Pierre Watkin

Senator Barnes

Charles Lane

Nosey

William Demarest

Bill Griffith

Dick Elliott

Carl Cook

Billy Watson

Peter Hopper

Delmar Watson

Jimmie Hopper

John Russell

Hopper Boy

Harry Watson

Hopper Boy

Larry Simms

Hopper Boy

Russell Simpson

Kenneth Allen (uncredited)

Frances Gifford

Hopper Girl (uncredited)

Wilson Benge

Hopper's Butler (uncredited)

Dickie Jones

Richard Jones (uncredited)

Erville Alderson

Handwriting Expert (uncredited)

Frank Puglia

Handwriting Expert (uncredited)

Maurice Cass

Handwriting Expert (uncredited)

Stanley Andrews

Senator Hodges (uncredited)

Al Bridge

Senator Dwight (uncredited)

Edwin August

Senator (uncredited)

Edmund Cobb

Senator Gower (uncredited)

Sam Ash

Senator Lancaster (uncredited)

Brooks Benedict

Senate Clerk (uncredited)

Wade Boteler

Family Man (uncredited)

Dorothy Comingore

Woman at Station (uncredited)

Chester Conklin

Reporter (uncredited)

Gino Corrado

Barber (uncredited)

Ann Doran

Paine's Secretary (uncredited)

Robert Emmett Keane

Editor (uncredited)

Matt McHugh

Reporter (uncredited)

Frank Austin

Inventor (uncredited)

William Arnold

Reporter (uncredited)

Tommy Baker

Boy Ranger (uncredited)

Robert Sterling

Senate Reporter (uncredited)

Dub Taylor

Reporter (uncredited)

George Chandler

Reporter (uncredited)

Fred 'Snowflake' Toones

Porter (uncredited)

Jack Carson

Sweeney Farrell (uncredited)

Tommy Bupp

Cheering Boy (uncredited)

Dora Clement

Mrs. McGann (uncredited)

Bert Moorhouse

Man in Senate Building (uncredited)

Harry C. Bradley

Arthur Kim (uncredited)

Lynton Brent

Photographer (uncredited)

Harlan Briggs

Mr. Edwards (uncredited)

Harry Burkhardt

Senate Reporter (uncredited)

Frederick Burton

Senator Dearhorn (uncredited)

Georgia Caine

Third Radio Speaker (uncredited)

Burr Caruth

Townsend (uncredited)

Allan Cavan

Ragner (uncredited)

Eddy Chandler

Reporter (uncredited)

Davison Clark

Committeeman (uncredited)

Eddie Coke

Photographer (uncredited)

Alec Craig

Speaker (uncredited)

Anne Cornwall

Senate Reporter (uncredited)

George Cooper

Waiter (uncredited)

Georgie Cooper

Committeewoman (uncredited)

Jack Cooper

Photographer (uncredited)

Nick Copeland

Senate Reporter (uncredited)

Vernon Dent

Senate Reporter (uncredited)

Maurice Costello

Diggs (uncredited)

Beatrice Curtis

Paine's Secretary (uncredited)

Lew Davis

Senate Clerk (uncredited)

Harry Depp

Hat Salesman / Secretary (uncredited)

Byron Foulger

Hopper's Secretary (uncredited)

Helen Jerome Eddy

Paine's Secretary (uncredited)

Douglas Evans

Francis Scott Key (uncredited)

Joe Devlin

Waiter (uncredited)

Clyde Dilson

Reporter (uncredited)

John Dilson

Secretary (uncredited)

Neal Dodd

Senate Chaplain (uncredited)

Lester Dorr

Taylor's Stooge (uncredited)

Robert Dudley

Reporter (uncredited)

Edward Earle

Reporter (uncredited)

Jack Egan

Reporter (uncredited)

Eddie Fetherston

Senate Reporter (uncredited)

Mabel Forrest

Senate Reporter (uncredited)

Gladys Gale

Committeewoman (uncredited)

Jack Gardner

Reporter (uncredited)

Mary Gordon

Woman (uncredited)

June Gittelson

Woman at Station (uncredited)

Lorna Gray

Woman at Station (uncredited)

Harry Hayden

First Radio Announcer (uncredited)

Louis Jean Heydt

Soapbox Speaker (uncredited)

John Ince

Senator Fernwick (uncredited)

Frank Jaquet

Senator Byron (uncredited)

Philo McCullough

Senator Albert (uncredited)

Wright Kramer

Senator Carlton (uncredited)

Henry Hebert

Senator (uncredited)

Philip Hurlic

Boy Ranger (uncredited)

Olaf Hytten

Butler (uncredited)

Lloyd Ingraham

Committeeman (uncredited)

Mitchell Ingraham

(uncredited)

John Lester Johnson

Butler (uncredited)

Eddie Kane

Reporter (uncredited)

Donald Kerr

Reporter (uncredited)

Milton Kibbee

Senate Reporter (uncredited)

Joe King

Summers (uncredited)

Evalyn Knapp

Reporter (uncredited)

Paul Kruger

Bodyguard (uncredited)

Bobby Larson

Boy Ranger (uncredited)

Billy Lechner

Boy Ranger (uncredited)

Vera Lewis

Mrs. Edwards (uncredited)

George Lloyd

Hoodlum (uncredited)

Arthur Loft

Chief Clerk (uncredited)

Jack Low

Hoodlum (uncredited)

Mary MacLaren

Head Sister (uncredited)

Hank Mann

Photographer (uncredited)

Margaret Mann

Nun (uncredited)

Eric Mayne

Man in Senate Building (uncredited)

George McKay

Reporter (uncredited)

Lafe McKee

Veteran at Lincoln Memorial (uncredited)

Ben Taggart

Pompous Man (uncredited)

Wilfred Lucas

Pompous Man (uncredited)

Sammy McKim

Boy Ranger (uncredited)

William Newell

Reporter (uncredited)

Robert Middlemass

Radio Announcer #2 (uncredited)

James Millican

Senate Reporter (uncredited)

Howard M. Mitchell

Shoe Salesman (uncredited)

Gene Morgan

Reporter (uncredited)

Frank O'Connor

Senator Alfred (uncredited)

Frank Otto

Fisk (uncredited)

Joe Palma

Hoodlum (uncredited)

Tom Quinn

Senate Reporter (uncredited)

Charles Regan

Hoodlum (uncredited)

Jack Rice

Lang (uncredited)

Wyndham Standing

Senator Ashman (uncredited)

Ferris Taylor

Senator Carlisle (uncredited)

Jack Richardson

Senator Manchester (uncredited)

Walter Soderling

Senator Pickett (uncredited)

Victor Travis

Senator Grainger (uncredited)

Carl Stockdale

Senator Burdette (uncredited)

Bob Walker

Senator Holland (uncredited)

Henry Roquemore

Senator (uncredited)

Craig Stevens

Senate Reporter (uncredited)

Paul Stanton

Flood a Newsman (uncredited)

Johnny Russell

Otis Hopper (uncredited)

Walter Sande

Newspaperman with Pipe (uncredited)

Frank M. Thomas

Hendricks (uncredited)

Harry Strang

Bodyguard (uncredited)

Harry Tenbrook

Bodyguard (uncredited)

Dave Willock

Senate Guard (uncredited)

Lloyd Whitlock

Schultz (uncredited)

John Tyrrell

(uncredited)

Frederick Vroom

Paine's Friend (uncredited)

Charles Sullivan

Cab Driver (uncredited)

Arthur Thalasso

Doorman (uncredited)

Layne Tom Jr.

Boy Ranger (uncredited)

Billy Wayne

Reporter (uncredited)

Max Waizmann

Photographer (uncredited)

John Ward

Photographer (uncredited)

Blanche Payson

Committeewoman (uncredited)

Emma Tansey

Committeewoman (uncredited)

Florence Wix

Committeewoman (uncredited)

Jesse Graves

Black Committeeman (uncredited)

Larry Steers

Committeeman (uncredited)

Landers Stevens

Committeeman (uncredited)

William Worthington

Committeeman (uncredited)

Edward Biby

Foreign Diplomat (uncredited)

Frank McLure

Senator (uncredited)