State, Incumbent, Year first elected
Alabama, (D) Doug Jones, 2017, 1.7
Alaska, (R) Dan Sullivan, 2014, 2.2
Arizona, (R) Martha McSally, N/A, 13.7
Arkansas, (R) Tom Cotton, 2014, 17.0
Colorado, (R) Cory Gardner, 2014, 1.9
Delaware, (D) Chris Coons, 2010, 13.6
Georgia, (R) David Perdue, 2014, 7.7
Georgia, (R) Kelly Loeffler, N/A, 13.8
Idaho, (R) Jim Risch, 2008, 30.6
Illinois, (D) Dick Durbin, 1996, 10.8
Iowa, (R) Joni Ernst, 2014, 8.3
Kansas, (R) Pat Roberts, 1996, 10.6
Kentucky, (R) Mitch McConnell, 1984, 15.5
Louisiana, (R) Bill Cassidy, 2014, 11.8
Maine, (R) Susan Collins, 1996, 36.2
Massachusetts, (D) Ed Markey, 2013, 22.8
Michigan, (D) Gary Peters, 2014, 13.3
Minnesota, (D) Tina Smith, 2018, 10.6
Mississippi, (R) Cindy Hyde-Smith, 2018, 7.2
Montana, (R) Steve Daines, 2014, 17.7
Nebraska, (R) Ben Sasse, 2014, 32.9
New Hampshire, (D) Jeanne Shaheen, 2008, 3.3
New Jersey, (D) Cory Booker, 2013, 13.5
New Mexico, (D) Tom Udall, 2008, 11.2
North Carolina, (R) Thom Tillis, 2014, 1.5
Oklahoma, (R) Jim Inhofe, 1994, 39.5
Oregon, (D) Jeff Merkley, 2008, 18.8
Rhode Island, (D) Jack Reed, 1996, 41.4
South Carolina, (R) Lindsey Graham, 2002, 15.7
South Dakota, (R) Mike Rounds, 2014, 20.9
Tennessee, (R) Lamar Alexander (retiring), 2014, 30.0
Texas, (R) John Cornyn, 2002, 27.2
Virginia, (D) Mark Warner, 2008, 0.8
West Virginia, (R) Shelley Moore Capito, 2014, 27.6
Wyoming, (R) Mike Enzi, 1996, 54.8
AC