How partisan is your Senator: Top 15 Republicans
| % of the time these Republican Senators vote with their own party | |
| 1. Richard Burr | 94.9 |
| 2. Rob Portman | 93.8 |
| 3. John Thune | 93.2 |
| 4. Daniel Coats | 92.9 |
| 5. Deb Fischer | 91.9 |
| 6. Jerry Moran | 91.6 |
| 7. Tom Coburn | 91.5 |
| 8. John Barrasso | 91.3 |
| 9. James M. Inhofe | 91.2 |
| 10. Ron Johnson | 91.1 |
| 11. Patrick J. Toomey | 90.6 |
| 12. Michael B. Enzi | 90.6 |
| 13. Mike Crapo | 90.1 |
| 14. Mitch McConnell | 90.1 |
| 15. Chuck Grassley | 90.1 |
Sources:
opencongress.org
