The move reflects a "prehistoric" level of debate on climate change in the wider US, according to another high-ranking European official, and anxiety in the Obama administration about its ability to get a new global treaty ratified in the US Senate, where it would require a two-thirds majority vote. The US has not ratified a major international environment treaty since 1992 and President Clinton never submitted the Kyoto protocol for approval, after a unaminous Senate vote indicated it would be rejected on economic grounds.
Stuart Eizenstat, who negotiated Kyoto for the US, said: "There has been a sea change in US attitudes [on climate] and the new president is deeply committed on this issue. But the EU needs to understand the limitations in the US. The reality is that is it impossible for my successor to negotiate something in Copenhagen beyond that which Congress will give the administration in domestic cap-and-trade legislation."