During his 2006 reelection campaign on a third party ticket
AL: Shelby, Sessions AK: Murkowski, Begich AZ: McCain, Kyl AR: Lincoln, Pryor CA: Feinstein, Boxer CO: Bennet, Udall CT: Dodd, Lieberman DE: Carper, Kaufman FL: Nelson, Martinez GA: Chambliss, Isakson HI: Inouye, Akaka ID: Crapo, Risch IL: Durbin, Burris
IN: Lugar, Bayh IO: Grassley, Harkin KS: Brownback, Roberts KY: McConnell, Bunning LA: Landrieu, Vitter ME: Snowe, Collins MD: Mikulski, Cardin MA: Kennedy, Kerry MI: Levin, Stabenow MN: Klobuchar, vacant MS: Cochran, Wicker MO: Bond, McCaskill
MT: Baucus, Tester NB: Nelson, Johanns NV: Reid, Ensign NH: Gregg, Shaheen NJ: Lautenberg, Menendez NM: Bingaman, Udall NY: Schumer, Gillibrand NC: Burr, Hagan ND: Conrad, Dorgan OH: Voinovich, Brown OK: Inhofe, Coburn OR: Wyden, Merkley
PA: Specter, Casey RI: Reed, Whitehouse SC: Graham, DeMint SD: Johnson, Thune TN: Alexander, Corker TX: Hutchison, Cornyn UT: Hatch, Bennett VT: Leahy, Sanders VA: Webb, Warner WA: Murray, Cantwell WV: Byrd, Rockefeller WI: Kohl, Feingold WY: Enzi, Barrasso