Political intransigence, not substantive objection, appears to be the latest roadblock to the U.S.'s efforts to address climate change. Contrary to expectations, U.S. Senators Kerry, Graham and Lieberman failed to unveil a new climate change bill on Monday. Washington news source The Hill reports that Senator Graham has temporarily withdrawn his support from the KGL bill, which is named in part after him.

Senator Graham's move is apparently motivated by his concern that Democrats would consider immigration reform legislation ahead of the KGL bill. In response, Democrat Senate Majority Leader Harry Reid signalled that the climate bill could be considered first, and even hinted that it would not be impossible to move it forward without Senator Graham. It is unclear if putting energy before immigration will be enought to placate Graham. However, Senators Kerry and Lieberman were clear that they do not plan to proceed without Graham's support.

Stay tuned.