Red states move to defend climate repeal

By Alex Guillén | 03/09/2026 01:38 PM EDT

The endangerment finding “choked off critical state-level activities for de minimis benefits,” the states argue.

Kentucky Attorney General Russell Coleman speaks at the annual Fancy Farm picnic Saturday, Aug. 2, 2025, in Fancy Farm, Ky.

Republican-led states seeking to defend the Trump administration's endangerment finding repeal are led by Kentucky Attorney General Russell Coleman (R). Mark Humphrey/AP

Twenty-five Republican-controlled states on Friday jumped into litigation to defend the Trump EPA’s repeal of the greenhouse gas endangerment finding and stop the return of emissions standards for vehicles and other sources.

The move to take on “intervenor” status for the states reflects the partisan nature of climate law and regulation.

Democratic-led states are expected to file their own legal challenges to the repeal, but have not yet done so. Environmental and public health groups have filed lawsuits — “a cadre of special interest groups,” according to the Republican-controlled states — as well as a coalition of youths.

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The states argued they have “good reason” to help defend the Trump repeal, which also undid all federal regulation of greenhouse gases from vehicles.

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