1. Sen. Marco Rubio (R-FL)
2. Sen. Chuck Grassley (R-IA)
3. Sen. Orrin Hatch (R-UT)
4. Sen. John Boozman (R-AR)
5. Sen. Roy Blunt (R-MO)
6. Sen. Jeff Sessions (R-AL)
7. Sen. James Risch (R-ID)
8. Sen. Jim Inhofe (R-OK)
9. Sen. John Cornyn (R-TX)
10. Sen. Tom Coburn (R-OK)
11. Sen. Mark Kirk (R-IL)
12. Sen. Jim DeMint (R-SC)
13. Rep. Ben Quayle (R-AZ)
14. Rep. Lee Terry (R-NE)
15. Rep. Dennis Ross (R-FL)
