BELEM, Brazil — California Governor Gavin Newsom assured an audience at the COP30 climate summit in Brazil that his state would continue to prioritize green technology, while blasting President Donald Trump ’s “dumb” decision to reverse the U.S. government’s course on climate action.

Newsom, widely considered a leading candidate for the Democratic presidential nomination in 2028, also sounded alarm bells at the Republican Trump’s policies, calling them threats to rule of law and democracy.

Making several appearances at the annual climate summit on Tuesday in the Amazonian city of Belem, Newsom took every opportunity to slam Trump’s attacks on the fast-growing clean energy economy. He said Republicans were ceding the fast-growth market to China , which “will dominate in the next

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