State

Class

Name

Prior Public Office/Position

Assumed Office

Alabama

3

Richard Shelby (Republican)

U.S. House, Alabama Senate

January 3, 1987 (January 3, 2017)

Alabama

2

Jeff Sessions (Republican)

Alabama Attorney General,U.S. Attorney for the Southern District of Alabama, U.S. ArmyCaptain

January 3, 1997 (January 3, 2021)

Alaska

3

Lisa Murkowski (Republican)

Alaska House of Representatives

December 20, 2002 (January 3, 2017)

Alaska

2

Dan Sullivan (Republican)

Commissioner of the Alaska Department of Natural Resources, Alaska Attorney General, Assistant U.S. Secretary of State for Economic and Business Affairs, U.S. Army Lieutenant Colonel

January 3, 2015 (January 3, 2021)

Arizona

3

John McCain (Republican)

U.S. House, U.S. Navy Captain

January 3, 1987 (January 3, 2017)

Arizona

1

Jeff Flake (Republican)

U.S. House

January 3, 2013 (January 3, 2019)

Arkansas

3

John Boozman (Republican)

U.S. House

January 3, 2011 (January 3, 2017)

Arkansas

2

Tom Cotton (Republican)

U.S. House, U.S. ArmyCaptain

January 3, 2015 (January 3, 2021)

California

1

Dianne Feinstein (Democratic)

Mayor of San Francisco, San Francisco Board of Supervisors

November 10, 1992 (January 3, 2019)

California

3

Barbara Boxer (Democratic)

U.S. House, Marin County Board of Supervisors

January 3, 1993 (January 3, 2017)

Colorado

3

Michael Bennet (Democratic)

Denver Public SchoolsSuperintendent

January 21, 2009 (January 3, 2017)

Colorado

2

Cory Gardner (Republican)

U.S. House, Colorado House of Representatives

January 3, 2015 (January 3, 2021)

Connecticut

3

Richard Blumenthal (Democratic)

Connecticut Attorney General,Connecticut Senate,Connecticut House of Representatives

January 5, 2011 (January 3, 2017)

Connecticut

1

Chris Murphy (Democratic)

U.S. House, Connecticut Senate, Connecticut House of Representatives

January 3, 2013 (January 3, 2019)

Delaware

1

Tom Carper (Democratic)

Governor of Delaware, U.S. House, Delaware State Treasurer, U.S. Navy Captain

January 3, 2001 (January 3, 2019)

Delaware

2

Chris Coons (Democratic)

County Executive of New Castle County

November 15, 2010 (January 3, 2021)

Florida

1

Bill Nelson (Democratic)

Florida State Treasurer, U.S. House, Florida House of Representatives, U.S. ArmyCaptain

January 3, 2001 (January 3, 2019)

Florida

3

Marco Rubio (Republican)

Speaker of the Florida House of Representatives

January 3, 2011 (January 3, 2017)

Georgia

3

Johnny Isakson (Republican)

U.S. House, Georgia Senate,Georgia House of Representatives

January 3, 2005 (January 3, 2017)

Georgia

2

David Perdue (Republican)

None (Businessman, Retail)

January 3, 2015 (January 3, 2021)

Hawaii

3

Brian Schatz (Democratic)

Lieutenant Governor of Hawaii, Hawaii House of Representatives

December 26, 2012 (January 3, 2017)

Hawaii

1

Mazie Hirono (Democratic)

U.S. House, Hawaii House of Representatives, Lieutenant Governor of Hawaii

January 3, 2013 (January 3, 2019)

Idaho

3

Mike Crapo (Republican)

U.S. House, Idaho Senate

January 3, 1999 (January 3, 2017)

Idaho

2

Jim Risch (Republican)

Governor of Idaho, Lieutenant Governor of Idaho, President pro tempore of the Idaho Senate, Ada CountyProsecuting Attorney

January 3, 2009 (January 3, 2021)

Illinois

2

Dick Durbin (Democratic)

U.S. House

January 3, 1997 (January 3, 2021)

Illinois

3

Mark Kirk (Republican)

U.S. House, U.S. NavyLieutenant Commander

November 29, 2010 (January 3, 2017)

Indiana

3

Dan Coats (Republican)

U.S. Ambassador to Germany, U.S. Senate, U.S. House

January 3, 2011 (January 3, 2017)

Indiana

1

Joe Donnelly (Democratic)

U.S. House

January 3, 2013 (January 3, 2019)

Iowa

3

Chuck Grassley (Republican)

U.S. House, Iowa House of Representatives

January 3, 1981 (January 3, 2017)

Iowa

2

Joni Ernst (Republican)

Iowa Senate, U.S. ArmyLieutenant Colonel

January 3, 2015 (January 3, 2021)

Kansas

2

Pat Roberts (Republican)

U.S. House, U.S. Marine Corps Captain

January 3, 1997 (January 3, 2021)

Kansas

3

Jerry Moran (Republican)

U.S. House, Kansas Senate

January 3, 2011 (January 3, 2017)

Kentucky

2

Mitch McConnell (Republican)

Jefferson County Executive

January 3, 1985 (January 3, 2021)

Kentucky

3

Rand Paul (Republican)

None (Ophthalmologist)

January 3, 2011 (January 3, 2017)

Louisiana

3

David Vitter (Republican)

U.S. House, Louisiana House of Representatives

January 3, 2005 (January 3, 2017)

Louisiana

2

Bill Cassidy (Republican)

U.S. House, Louisiana Senate

January 3, 2015 (January 3, 2021)

Maine

2

Susan Collins (Republican)

Commissioner of the Maine Department of Professional and Financial Regulation

January 3, 1997 (January 3, 2021)

Maine

1

Angus King (Independent)

Governor of Maine

January 3, 2013 (January 3, 2019)

Maryland

3

Barbara Mikulski (Democratic)

U.S. House, Baltimore City Council

January 3, 1987 (January 3, 2017)

Maryland

1

Ben Cardin (Democratic)

U.S. House, Maryland House of Delegates

January 3, 2007 (January 3, 2019)

Massachusetts

1

Elizabeth Warren (Democratic)

Special Assistant to the President, Special Advisor for the Consumer Financial Protection Bureau

January 3, 2013 (January 3, 2019)

Massachusetts

2

Ed Markey (Democratic)

U.S. House, Massachusetts House

July 16, 2013 (January 3, 2021)

Michigan

1

Debbie Stabenow (Democratic)

U.S. House, Michigan Senate,Michigan House of Representatives, Ingham CountyBoard of Commissioners

January 3, 2001 (January 3, 2019)

Michigan

2

Gary Peters (Democratic)

U.S. House, Michigan LotteryCommissioner, Michigan Senate, U.S. Navy Lieutenant Commander

January 3, 2015 (January 3, 2021)

Minnesota

1

Amy Klobuchar (Democratic-Farmer-Labor)

Hennepin County Attorney

January 3, 2007 (January 3, 2019)

Minnesota

2

Al Franken (Democratic-Farmer-Labor)

None (Entertainer)

July 7, 2009 (January 3, 2021)

Mississippi

2

Thad Cochran (Republican)

U.S. House

December 27, 1978 (January 3, 2021)

Mississippi

1

Roger Wicker (Republican)

U.S. House, Mississippi State Senate

December 31, 2007 (January 3, 2019)

Missouri

1

Claire McCaskill (Democratic)

State Auditor of Missouri,Missouri House of Representatives, Jackson County Prosecutor

January 3, 2007 (January 3, 2019)

Missouri

3

Roy Blunt (Republican)

U.S. House, Missouri Secretary of State, President of Southwest Baptist University

January 3, 2011 (January 3, 2017)

Montana

1

Jon Tester (Democratic)

President of the Montana Senate

January 3, 2007 (January 3, 2019)

Montana

2

Steve Daines (Republican)

U.S. House

January 3, 2015 (January 3, 2021)

Nebraska

1

Deb Fischer (Republican)

Nebraska Legislature

January 3, 2013 (January 3, 2019)

Nebraska

2

Ben Sasse (Republican)

None (College President, College Professor, Consultant)

January 3, 2015 (January 3, 2021)

Nevada

3

Harry Reid (Democratic)

U.S. House, Lieutenant Governor of Nevada, Nevada Assembly

January 3, 1987 (January 3, 2017)

Nevada

1

Dean Heller (Republican)

U.S. House, Nevada Secretary of State, Nevada Assembly

May 9, 2011 (January 3, 2019)

New Hampshire

2

Jeanne Shaheen (Democratic)

Governor of New Hampshire,New Hampshire Senate

January 3, 2009 (January 3, 2021)

New Hampshire

3

Kelly Ayotte (Republican)

New Hampshire Attorney General

January 3, 2011 (January 3, 2017)

New Jersey

1

Bob Menendez (Democratic)

U.S. House, New Jersey Senate, New Jersey General Assembly, Mayor of Union City

January 18, 2006 (January 3, 2019)

New Jersey

2

Cory Booker (Democratic)

Mayor of Newark

October 31, 2013 (January 3, 2021)

New Mexico

2

Tom Udall (Democratic)

Assistant U.S. Attorney, U.S. House, New Mexico Attorney General

January 3, 2009 (January 3, 2021)

New Mexico

1

Martin Heinrich (Democratic)

U.S. House, Albuquerque City Council

January 3, 2013 (January 3, 2019)

New York

3

Chuck Schumer (Democratic)

U.S. House, New York State Assembly

January 3, 1999 (January 3, 2017)

New York

1

Kirsten Gillibrand (Democratic)

U.S. House

January 26, 2009 (January 3, 2019)

North Carolina

3

Richard Burr (Republican)

U.S. House

January 3, 2005 (January 3, 2017)

North Carolina

2

Thom Tillis (Republican)

Speaker of the North Carolina House of Representatives

January 3, 2015 (January 3, 2021)

North Dakota

3

John Hoeven (Republican)

Governor of North Dakota

January 3, 2011 (January 3, 2017)

North Dakota

1

Heidi Heitkamp (Democratic)

North Dakota Attorney General, Tax Commissioner of North Dakota

January 3, 2013 (January 3, 2019)

Ohio

1

Sherrod Brown (Democratic)

U.S. House, Ohio Secretary of State, Ohio House of Representatives

January 3, 2007 (January 3, 2019)

Ohio

3

Rob Portman (Republican)

U.S. House, U.S. Trade Representative, Director of the Office of Management and Budget

January 3, 2011 (January 3, 2017)

Oklahoma

2

Jim Inhofe (Republican)

U.S. House, Mayor of Tulsa,Oklahoma Senate, Oklahoma House of Representatives

November 17, 1994 (January 3, 2021)

Oklahoma

3

James Lankford (Republican)

U.S. House

January 3, 2015 (January 3, 2017)

Oregon

3

Ron Wyden (Democratic)

U.S. House

February 6, 1996 (January 3, 2017)

Oregon

2

Jeff Merkley (Democratic)

Speaker of the Oregon House

January 3, 2009 (January 3, 2021)

Pennsylvania

1

Bob Casey, Jr. (Democratic)

Pennsylvania State Treasurer,Pennsylvania Auditor General

January 3, 2007 (January 3, 2019)

Pennsylvania

3

Pat Toomey (Republican)

U.S. House

January 3, 2011 (January 3, 2017)

Rhode Island

2

Jack Reed (Democratic)

U.S. House, Rhode Island Senate, U.S. Army Major

January 3, 1997 (January 3, 2021)

Rhode Island

1

Sheldon Whitehouse (Democratic)

Special Assistant to Attorney General, Governor's Executive Counsel, Rhode Island Attorney General, U.S. Attorney for the District of Rhode Island, Rhode Island Director of Business Regulation

January 3, 2007 (January 3, 2019)

South Carolina

2

Lindsey Graham (Republican)

U.S. House, South Carolina House of Representatives,U.S. Army Colonel

January 3, 2003 (January 3, 2021)

South Carolina

3

Tim Scott (Republican)

U.S. House, South Carolina House of Representatives,Charleston County Council

January 2, 2013 (January 3, 2017)

South Dakota

3

John Thune (Republican)

U.S. House

January 3, 2005 (January 3, 2017)

South Dakota

2

Mike Rounds (Republican)

Governor of South Dakota,South Dakota Senate

January 3, 2015 (January 3, 2021)

Tennessee

2

Lamar Alexander (Republican)

Governor of Tennessee, U.S. Secretary of Education

January 3, 2003 (January 3, 2021)

Tennessee

1

Bob Corker (Republican)

Mayor of Chattanooga,Tennessee Commissioner of Finance and Administration

January 3, 2007 (January 3, 2019)

Texas

2

John Cornyn (Republican)

Texas Attorney General,Associate Justice of the Texas Supreme Court

December 1, 2002 (January 3, 2021)

Texas

1

Ted Cruz (Republican)

Solicitor General of Texas

January 3, 2013 (January 3, 2019)

Utah

1

Orrin Hatch (Republican)

None (Attorney)

January 3, 1977 (January 3, 2019)

Utah

3

Mike Lee (Republican)

Assistant U.S. Attorney

January 3, 2011 (January 3, 2017)

Vermont

3

Patrick Leahy (Democratic)

Chittenden County State's Attorney

January 3, 1975 (January 3, 2017)

Vermont

1

Bernie Sanders (Independent(Democratic Socialist))

Mayor of Burlington, U.S. House

January 3, 2007 (January 3, 2019)

Virginia

2

Mark Warner (Democratic)

Governor of Virginia,Chairman of the Virginia Democratic Party

January 3, 2009 (January 3, 2021)

Virginia

1

Tim Kaine (Democratic)

Governor of Virginia,Lieutenant Governor of Virginia, Mayor of Richmond,Richmond city councilman,Chairman of the Democratic National Committee

January 3, 2013 (January 3, 2019)

Washington

3

Patty Murray (Democratic)

Washington Senate, Shoreline School District Board of Directors

January 3, 1993 (January 3, 2017)

Washington

1

Maria Cantwell (Democratic)

U.S. House, Washington House of Representatives

January 3, 2001 (January 3, 2019)

West Virginia

1

Joe Manchin (Democratic)

Governor of West Virginia,West Virginia Secretary of State, West Virginia Senate,West Virginia House of Delegates

November 15, 2010 (January 3, 2019)

West Virginia

2

Shelley Moore Capito (Republican)

U.S. House

January 3, 2015 (January 3, 2021)

Wisconsin

3

Ron Johnson (Republican)

None (Businessman, Manufacture)

January 3, 2011 (January 3, 2017)

Wisconsin

1

Tammy Baldwin (Democratic)

U.S. House, Wisconsin State Assembly, Dane County, Wisconsin Board of Supervisors

January 3, 2013 (January 3, 2019)

Wyoming

2

Mike Enzi (Republican)

Wyoming Senate, Wyoming House of Representatives, Mayor of Gillette

January 3, 1997 (January 3, 2021)

Wyoming

1

John Barrasso (Republican)

Wyoming Senate

June 25, 2007 (January 3, 2019)