34 Senators who’s terms expire in 2016 (10D and 24R)
Party - State - Incumbent
Democrat - CA - Barbara Boxer (not running)
Democrat - CO - Michael Bennet
Democrat - CT - Richard Blumenthal
Democrat - HI - Brian Schatz
Democrat - MD - Barbara Mikulski
Democrat - NV - Harry Reid (not running)
Democrat - NY - Chuck Schumer
Democrat - OR - Ron Wyden
Democrat - VT - Patrick Leahy
Democrat - WA - Patty Murray
- - - - - - - - - - -
Republican - AL - Richard Shelby
Republican - AK - Lisa Murkowski
Republican - AZ - John McCain
Republican - AR - John Boozman
Republican - FL - Marco Rubio
Republican - GA - Johnny Isakson
Republican - ID - Mike Crapo
Republican - IL - Mark Kirk
Republican - IN - Dan Coats (not running)
Republican - IA - Chuck Grassley
Republican - KS - Jerry Moran
Republican - KY - Rand Paul
Republican - LA - David Vitter
Republican - MS - Roy Blunt
Republican - NH - Kelly Ayotte
Republican - NC - Richard Burr
Republican - ND - John Hoeven
Republican - OH - Rob Portman
Republican - OK - James Lankford
Republican - PA - Pat Toomey
Republican - SC - Tim Scott
Republican - SD - John Thune
Republican - UT - Mike Lee
Republican - WI - Ron Johnson
Correction: Roy Blunt (R) is from Missouri (MO).