During his 2006 reelection campaign on a third party ticket
AL: Shelby, Sessions AK: Murkowski, Begich AZ: McCain, Kyl AR: Boozman, Pryor CA: Feinstein, Boxer CO: Bennet, Udall CT: Blumenthal, Lieberman DE: Carper, Coons FL: Nelson, Rubio GA: Chambliss, Isakson HI: Inouye, Akaka ID: Crapo, Risch IL: Durbin, Kirk
IN: Lugar, Coats IO: Grassley, Harkin KS: Moran, Roberts KY: McConnell, Paul LA: Landrieu, Vitter ME: Snowe, Collins MD: Mikulski, Cardin MA: Kerry, Brown MI: Levin, Stabenow MN: Klobuchar, Franken MS: Cochran, Wicker MO: Blunt, McCaskill
MT: Baucus, Tester NB: Nelson, Johanns NV: Reid, Heller NH: Ayotte, Shaheen NJ: Lautenberg, Menendez NM: Bingaman, Udall NY: Schumer, Gillibrand NC: Burr, Hagan ND: Conrad, Hoeven OH: Portman, Brown OK: Inhofe, Coburn OR: Wyden, Merkley
PA: Toomey, Casey RI: Reed, Whitehouse SC: Graham, DeMint SD: Johnson, Thune TN: Alexander, Corker TX: Hutchison, Cornyn UT: Hatch, Lee VT: Leahy, Sanders VA: Webb, Warner WA: Murray, Cantwell WV: Manchin, Rockefeller WI: Kohl, Johnston WY: Enzi, Barrasso