President Trump has been trying to eliminate climate regulations since his first day back in office when he signed an executive order declaring the primacy of fossil fuels.

But his administration’s most radical step came last week, when the Environmental Protection Agency unveiled a proposal that would rescind its 2009 “endangerment finding” — the scientific conclusion that greenhouse gases contribute to global warming and harm human health and well-being.

This isn’t just another regulatory rollback. It’s an assault on the foundation of all federal climate policy.

The endangerment finding originally applied to vehicle emissions, but it also underpins every major federal climate rule in America: car and truck emissions standards, power plant regulations and limits on oil and gas facili

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