President Obama is moving quickly to act on the environmental promises that were a centerpiece of his campaign. But tackling global warming will be far more difficult - and more costly - than the new emissions standards for automobiles he ordered with the stroke of a pen on Monday.
Already, the Congressional Democrats Mr. Obama will need to carry out his mandate are feuding with one another.
By coincidence or design, most of the policy makers on Capitol Hill and in the administration charged with shaping legislation to address global warming come from California or the East Coast, regions that lead the country in environmental regulation and the push for renewable energy sources.
That is a problem, says a group of Democratic lawmakers from the Midwest and Plains States, which are heavily dependent on coal and manufacturing. The lawmakers have banded together to fight legislation they think might further damage their economies.
“There's a bias in our Congress and government against manufacturing, or at least indifference to us, especially on the coasts,” said Senator Sherrod Brown, Democrat of Ohio. "It's up to those of us in the Midwest to show how important manufacturing is. If we pass a climate bill the wrong way, it will hurt American jobs and the American economy, as more and more production jobs go to places like China, where it's cheaper."
This brown state-green state clash is likely to encumber any effort to set a mandatory ceiling on the carbon dioxide emissions blamed as the biggest contributor to global warming, something Mr. Obama has declared to be one of his highest priorities. Mr. Obama has said he intends to press ahead on such an initiative, despite opposition within his own party in Congress and divisions among some of his advisers over the timing, scope and cost of legislation to curb carbon emissions.
The centrist Democrats who urge a slower-paced approach represent states that are crucial electoral battlegrounds and that stand to lose the most from such regulation. They say they believe that global warming is a serious threat and they will support legislation to address the problem - but not at the expense of their already-strained workers and industries.