With US President Donald Trump skipping the UN's climate summit in the Amazon, California Governor Gavin Newsom grabbed the spotlight at COP30 on Tuesday and took a swipe at the fossil fuel agenda of his political nemesis.

The well-coiffed Democrat -- seen as a potential 2028 presidential candidate -- slammed Trump for leaving the Paris climate accord and for "doubling down on stupid" through his pro-oil stance.

Newsom said a Democratic administration would rejoin the Paris Agreement "without hesitation."

"It's a moral commitment, it's an economic imperative, it's both -- and it's an abomination that he has twice, not once, pulled away from the accords," Newsom said in response to a question by AFP in Belem, the Brazilian Amazon city hosting the COP30 climate summit.

Newsom appeared al

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