California Governor Gavin Newsom says his Democratic party is "back on its feet" after a string of election wins -- and the way to make Americans care about global warming is to show how it affects their wallets.

The 58-year-old leader of the Golden State spoke to AFP at the UN's annual climate summit, held this year in Belem, a northern Brazilian city on the edge of the Amazon rainforest.

Newsom has emerged as one of President Donald Trump's fiercest foes during the Republican's second term, matching Trump's bombastic style on social media and raising his own national profile -- though some critics see such tactics as a race to the bottom.

Democrats were wiped out in last year's national elections, which saw Trump return to power, but the party rallied in state and local contests earli

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