President Obama vowed last year that he wouldn't wait on Congress to bless his anticarbon agenda, and the rule his Environmental Protection Agency proposed on Monday is equal to that promise. The agency is bidding to transform and nationalize U.S. energy the way ObamaCare is doing to medicine, but in this case without even the pretense of democratic consent.

The EPA's goal is to cut carbon emissions by 30% by 2030 from near-peak 2005 levels, which will inevitably raise the price of electricity and thus all other goods down the energy chain. The 645-page rule is targeted at the 1,000 or so U.S. fossil fuel power plants, but it more or less orders states to adopt cap and trade or a carbon tax.

A Democratic Congress debated and rejected this anticarbon program in 2010, and there isn't a chance it could get 50 Senate votes now. But no matter, the EPA claims the authority for this sweeping power grab by pointing to an obscure clause of the 1970 Clean Air Act called Section 111(d) that runs merely a few hundred words and historically has been applied only to minor pollutants, not the entire economy.

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The new rule is unprecedented because EPA is supposed to regulate "inside the fenceline," meaning that its command-and-control powers are limited to individual energy generator sources. The agency can tell America's 3,000 or so fossil-fuel power units to install on-site technology like scrubbers to reduce pollution, but not beyond. Now the agency is taking a "systems-based approach" that usurps state responsibilities in order to move electricity production away first from coal and later natural gas.

The EPA is claiming states can choose whatever methods they like to meet the carbon targets, from shuttering plants to installing more green sources like wind and solar. But beware of the Obama EPA bearing gifts. The agency recently rejected state plans to reduce regional haze before they are even formally proposed and revoked permits it had previously approved.