The Trump administration has moved to repeal the 2009 “endangerment finding” — the scientific determination that underpins the federal government’s authority to regulate climate change. The decision marks one of the most consequential climate policy shifts in years and sets up a major legal and political battle. POLITICO’s Jean Chemnick and Alex Guillén join host Nirmal Mulaikal to explain what the endangerment finding does, why it matters, and what happens next for U.S. climate policy.

Alex Guillén is an energy reporter for POLITICO.

Jean Chemnick covers climate change at EPA and other agencies for E&E News.

Stefan Todorovic is the video producer of POLITICO Energy.

Nirmal Mulaikal is the co-host and executive producer of POLITICO Energy.

Matt Daily is the energy editor for POLITICO.

Cyril Zaneski is executive editor of E&E News.

Debra Kahn is the editorial director for energy and environmental coverage at POLITICO.

Our theme music is by Pran Bandi.

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Inside Trump’s biggest climate rollback yet