| Senators | State |
| Mitch McConnell / Rand Paul | |
| Mark Udall / Michael Bennet | |
| Jim Inhofe / Tom Coburn | |
| Tim Johnson / John Thune | |
| Patty Murray / Maria Cantwell | |
| Dick Durbin / Mark Kirk | |
| Richard Blumenthal / Joe Lieberman | |
| Rob Portman / Sherrod Brown | |
| Kent Conrad / John Hoeven | |
| Chuck Grassley / Tom Harkin | |
| Amy Klobuchar / Al Franken | |
| Richard Burr / Kay Hagan | |
| Saxby Chambliss / Johnny Isakson | |
| Dianne Feinstein / Barbara Boxer | |
| Jim Webb / Mark Warner | |
| Jack Reed / Sheldon Whitehouse | |
| Tom Carper / Chris Coons | |
| Jerry Moran / Pat Roberts | |
| Jay Rockefeller / Joe Manchin, III | |
| Barbara Mikulski / Ben Cardin | |
| Patrick Leahy / Bernie Sanders | |
| Jeff Bingaman / Tom Udall | |
| Lamar Alexander / Bob Corker | |
| John McCain / John Kyl | |
| Chuck Schumer / Kirsten Gillibrand | |
| No Senators | |
| No Senators | |
| No Senators | |