"As climate change legislation stalled in the Senate, the Obama administration noted that it had a workable -- although admittedly unwieldy -- Plan B. If Congress wouldn't cap U.S. emissions, officials said, the Environmental Protection Agency would do it instead.
Now, even Plan B may be in trouble.
On Thursday, Sen. John D. Rockefeller IV (D-W.Va.) introduced a bill that would put a two-year freeze on the EPA's ability to regulate greenhouse gases from power plants. His was the latest of various congressional proposals -- from both chambers and both parties -- designed to delay or overturn the EPA's regulations.
It is unclear how far Rockefeller's bill will go. Even if it passed, it could face a presidential veto. But environmentalists are worried that the measure could attract moderate Democrats, who are worried, in turn, about driving up the prices of fossil fuels such as oil and coal."