The Sierra Club fired its executive director this week, and he’s vowing to fight his termination. POLITICO’s Zack Colman unpacks the internal turmoil atop one of the nation’s most influential environmental groups, and what it reveals about the broader struggles of green groups under the second Trump administration.

Zack Colman covers climate change for POLITICO. 

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

Alex Keeney is a senior audio producer at POLITICO. 

Gloria Gonzalez is the deputy energy editor for POLITICO. 

Matt Daily is the energy editor for POLITICO.

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