Thursday's Republican-led resolution would prevent the Environmental Protection Agency from moving ahead with rules under the Clean Air Act to regulate carbon and other greenhouse gas emissions from power plants and other major sources. Support from several moderate and coal-state Democrats should make vote close.
It's one of the first this year to put lawmakers on the record in the climate change debate.
Those trying to block the EPA rules argue that Congress, not bureaucrats, should be crafting climate change policy. But there's little prospect that the Senate will act soon on the broader energy bill, and the administration and most Democrats contend steps must be taken in the meantime to hold down greenhouse gas pollutants.