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Government 101: Congress - Senate Classes

The legislative branch of the federal government.

Article I of the US Constitution mandates that the Senate be elected in cycles, such that one third of the Senators are elected every two years. A Senator's class refers to the cycle in which he/she was elected.

Senate Class I - Next Elect 2018

Tammy Baldwin (D - WI)
John Barrasso (R - WY)
Sherrod Brown (D - OH)
Maria Cantwell (D - WA)
Ben Cardin (D - MD)
Tom Carper (D - DE)
Bob Casey, Jr. (D - PA)
Robert Corker (R - TN)
Ted Cruz (R - TX)
Joe Donnelly, Sr. (D - IN)
Dianne Feinstein (D - CA)
Deb Fischer (R - NE)
Jeff Flake (R - AZ)
Kirsten Gillibrand (D - NY)
Orrin Hatch (R - UT)
Martin Heinrich (D - NM)
Heidi Heitkamp (D - ND)
Dean Heller (R - NV)
Mazie Hirono (D - HI)
Tim Kaine (D - VA)
Angus King, Jr. (I - ME)
Amy Klobuchar (D - MN)
Joe Manchin III (D - WV)
Claire McCaskill (D - MO)
Bob Menendez (D - NJ)
Chris Murphy (D - CT)
Bill Nelson, Sr. (D - FL)
Bernie Sanders (I - VT)
Debbie Stabenow (D - MI)
Jon Tester (D - MT)
Elizabeth Warren (D - MA)
Sheldon Whitehouse (D - RI)
Roger Wicker (R - MS)

Senate Class II - Next Elect 2014

Lamar Alexander (R - TN)
Mark Begich (D - AK)
Cory Booker (D - NJ)
Thad Cochran (R - MS)
Susan Collins (R - ME)
Chris Coons (D - DE)
John Cornyn (R - TX)
Dick Durbin (D - IL)
Mike Enzi (R - WY)
Al Franken (D - MN)
Lindsey Graham (R - SC)
Kay Hagan (D - NC)
Tom Harkin (D - IA)
Jim Inhofe (R - OK)
Mike Johanns (R - NE)
Timothy Johnson (D - SD)
Mary Landrieu (D - LA)
Carl Levin (D - MI)
Ed Markey (D - MA)
Mitch McConnell (R - KY)
Jeff Merkley (D - OR)
Mark Pryor (D - AR)
Jack Reed (D - RI)
James Risch (R - ID)
Pat Roberts (R - KS)
Jay Rockefeller IV (D - WV)
Brian Schatz (D - HI)
Tim Scott (R - SC)
Jeff Sessions III (R - AL)
Jeanne Shaheen (D - NH)
Mark Udall (D - CO)
Tom Udall (D - NM)
John Walsh (D - MT)
Mark Warner (D - VA)

Senate Class III - Next Elect 2016

Kelly Ayotte (R - NH)
Michael Bennet (D - CO)
Richard Blumenthal (D - CT)
Roy Blunt (R - MO)
John Boozman (R - AR)
Barbara Boxer (D - CA)
Richard Burr (R - NC)
Daniel Coats (R - IN)
Mike Crapo (R - ID)
Chuck Grassley (R - IA)
John Hoeven (R - ND)
Johnny Isakson (R - GA)
Ron Johnson (R - WI)
Mark Kirk (R - IL)
Patrick Leahy (D - VT)
Mike Lee (R - UT)
John McCain III (R - AZ)
Barbara Mikulski (D - MD)
Jerry Moran (R - KS)
Lisa Murkowski (R - AK)
Patty Murray (D - WA)
Rand Paul (R - KY)
Rob Portman (R - OH)
Harry Reid (D - NV)
Marco Rubio (R - FL)
Chuck Schumer (D - NY)
Richard Shelby (R - AL)
John Thune (R - SD)
Pat Toomey (R - PA)
David Vitter (R - LA)
Ron Wyden (D - OR)

Senate Class None - Next Elect

Saxby Chambliss (R - GA)
Thomas Coburn (R - OK)
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