Big developing nations like China, India, Brazil, South Africa and Mexico are refusing to make any international commitments while the US refuses to move.
Climate negotiators from Europe and Africa have told BBC News that a Democratic presence in Bali would be very welcome. They said it could apply pressure on President Bush's representatives in the negotiating hall.
Last week, Sigmar Gabriel, the German environment minister, said he had visited Mr Bush's Washington meeting on climate change and that he had enjoyed very fruitful discussions with the Democrats about the shape of US climate policy.
Dr R K Pachauri, head of the Intergovernmental Panel on Climate Change (IPCC), observed: "I think it's very important for legislators from every country to be exposed to what's going to happen in Bali.
"In a Conference of the Parties (COP), what happens in the corridors is just as important, maybe more important, than what happens in the negotiating hall," he told BBC News."I would like to see legislators from China and India taking part, too."