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President Obama, in his weekly radio address, beseeched voters to get behind his climate change plan and punish politicians who don’t.

He may want to be careful what he asks for. Several of those lawmakers come from the president’s own party.

Coal-state Democrats have been as scathing as any Republican in reaction to the president’s plan, unveiled Tuesday in a speech at Georgetown University. The pushback was almost immediate, and a glaring signal of the trouble Obama may encounter as he charges ahead with new restrictions on coal-fired power plants.

Though Obama technically is going around Congress by having the Environmental Protection Agency impose the rules, moderate Democrats made clear they will pressure the administration from inside the party to scale back. They carry a simple message: The regulations will kill jobs, but working with the coal industry to improve its own clean-coal technology won’t.