Maine

Olympia Snowe

*Susan Collins

New Hampshire

~Judd Gregg RET

*Jeanne Shaheen

Massachusetts

Scott Brown

*John Kerry

Rhode Island

*Jack Reed

Sheldon Whitehouse

Connecticut

~Christopher Dodd RET

Joe Lieberman

New York

~Chuck Schumer

~Kirsten Gillibrand

New Jersey

*Frank Lautenberg

Robert Menendez

Washington

~Patty Murray

Maria Cantwell

Oregon

~Ron Wyden

*Jeff Merkley

California

Diane Feinstein

~Barbara Boxer

Minnesota

Amy Klobuchar

*Al Franken

Wisconsin

Herb Kohl

~Russ Feingold

Illinois

*Dick Durbin

~Roland Burris R

Iowa

~Chuck Grassley

*Tom Harkin

Missouri

~Kit Bond RET

Claire McCaskill

North Dakota

Kent Conrad

~Byron Dorgan RET

South Dakota

*Tim Johnson

~John Thune

Nebraska

Ben Nelson

*Mike Johanns

Kansas

~Sam Brownback RET

*Pat Roberts

Idaho

~Mike Crapo

*James Risch

Montana

*Max Baucus

Jon Tester

Wyoming

*Mike Enzi

John Barrasso

Nevada

~Harry Reid

John Ensign

Hawaii

~Daniel Inouye

Daniel Akaka

Alaska

~Lisa Murkowski

*Mark Begich

Arkansas

~Blanche Lincoln

*Mark Pryor

Mississippi

*Thad Cochran

Roger Wicker

Louisiana

*Mary Landrieu

~David Vitter

Oklahoma

*James Inhofe

~Tom Coburn

Texas

Kay Bailey-Hutchinson

*John Cornyn

North Carolina

~Richard Burr

*Kay Hagan

South Carolina

*Lindsey Graham

~Jim DeMint

Georgia

*Saxby Chambliss

~Johnny Isakson

Florida

Bill Nelson

~George LeMieux R

Michigan

*Carl Levin

Debbie Stabenow

Ohio

~George Voinovich RET

Sherrod Brown

Indiana

Dick Lugar

~Evan Bayh RET

Pennsylvania

~Arlen Specter P

Bob Casey

Delaware

Thomas Carper

*Ted Kaufman R

Maryland

~Barbara Mikulski

Ben Cardin

Virginia

Jim Webb

*Mark Warner

Vermont

~Patrick Leahy

Bernie Sanders

West Virginia

Robert Byrd

*John D. Rockefeller

Kentucky

*Mitch McConnell

~Jim Bunning RET

Tennessee

*Alexander Lamar

Bob Corker

Alabama

~Richard Shelby

*Jeff Sessions

Colorado

*Mark Udall

~Michael Bennet

New Mexico

Jeff Bingaman

*Tom Udall

Utah

Orrin Hatch

~Bob Bennett P

Arizona

~John McCain

Jon Kyl

~ 2011

2013

* 2015

P = Primary loss