Mike Crapo (R-ID)
Ted Cruz (R-TX)
Mike Enzi (R-WY)
Chuck Grassley (R-IA)
Dean Heller (R-NV)
Mike Lee (R-UT)
Rand Paul (R-KY)
James Risch (R-ID)
Pat Roberts (R-KS)
Marco Rubio (R-FL)
Jeff Sessions (R-AL)
Richard Shelby (R-AL)
Pat Toomey (R-PA)
David Vitter (R-LA)
And a maybe:
Tim Scott (R-SC)
That is a good start to build on. Interesting that the new woman from Nebraska is not on that list, after what the tea party did to put her over the top.