Politico:

Environmental Protection Agency Administrator Lisa Jackson reassured Democrats that the agency would take a cautious approach to regulating greenhouse gases, in a letter sent to coal state representatives on Monday.
An agency plan to regulate greenhouse gases from large, industrial sources has come under fierce criticism from Republicans, coal state Democrats, and industry groups.
Jackson’s quick response is an attempt to keep Democrats from voting to veto the agency plan.
In her letter, Jackson said that no industrial facilities will be required to curb greenhouse gas emissions in this year. The agency would phase-in permit requirements starting in 2011. The smallest sources would not be subjected to permitting for emissions until 2016, she wrote.
But Jackson’s statement didn’t go far enough for some critics.
“While the delay in implementation is a small forced step in the right direction, the Clean Air Act continues to be the wrong tool for the job,” Alaska Republican Lisa Murkowski said. “And [the] EPA’s timeline continues to create significant and ongoing uncertainty for a business community.”
Murkowski and three Democratic co-sponsors hope to bring a resolution to the Senate floor in the next month that would veto the EPA rule altogether.

The rest here.