Updated 2:35 p.m. | Democrats are already promising a Congressional Review Act challenge to the Trump administration’s proposal Tuesday to replace an Obama-era regulation curbing climate-warming carbon emissions from the electric power sector.

For President Donald Trump and Capitol Hill Republicans, the draft proposal marks the culmination of a three-year battle to repeal the Clean Power Plan, a rulemaking finalized in 2015 that required states to devise plans to cut carbon emissions from existing coal-powered electricity plants and other high carbon-emitting energy sources.

Republicans lawmakers cheered the proposal’s cost savings and shifting of authority to states, and Democrats complained that the new plan would be an inadequate response to climate change and might lead to as many as 1,400 premature deaths.

Democrats pledged to use the CRA, which allows for an expedited, filibuster-proof Senate vote if backers can round up at least 30 signatures, to try to kill the plan should one or both chambers flip to Democratic control after the midterm elections. Trump would ultimately have veto power over such a resolution.

“I intend along with others using the legislative tools available to us in the Senate including the Congressional Review Act to undo this harmful plan,” Sen. Edward J. Markey of Massachussetts said at a news conference Tuesday in response to the EPA’s proposal.