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California Gov. Gavin Newsom speaks during an interview with The Associated Press at the COP30 U.N. Climate Summit, Tuesday, Nov. 11, 2025, in Belem, Brazil. (AP Photo/Joshua A. Bickel)

BELEM – Calling America’s absence from key United Nations climate negotiations “doubling down on stupid,” California Gov. Gavin Newsom said Tuesday the United States risks being left behind as an economic power.

Newsom , a Democrat eyeing a 2028 presidential run, is so far the highest profile of several U.S. governors and mayors at U.N. climate talks being hosted in Belem, Brazil. They say they are here to tell the 195 nations who are trying to fight climate change that much of the United States is doing its best despite Trump adminis

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