Kate Sheppard at Mother Jones has the bad news:

Alaska Republican Lisa Murkowski has gained co-sponsorship for her effort to block the EPA from regulating carbon dioxide from at least one Democrat, her office confirmed Friday evening.

Spokesman Robert Dillon said that one Democrat has signed on, though he was not able to confirm the identity of the Democrat. There are, however, plenty of ideas about who this Democratic cosponsor may be. Mary Landrieu (D-La.), Ben Nelson (D-Neb.), Jim Webb (D-Va.), Byron Dorgan (D-N.D.), and Blanche Lincoln (D-Ark.), all previously on record voicing concerns about carbon regulation, have been floated as possible sign-ons. We’ve put in inquiries at all those offices and will update as more information becomes available.

Miles Grant thinks it might be Senator Webb.

I wouldn’t put it past any of the dirty Dems listed above. All five are in the pocket of the coal and/or oil and/or agriculture  industries. Then again, Robert Dillon, Kate’s apparent source on this, is completely full of shit.