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Mr. Trump has taken broad aim at efforts to fight global warming since his first days in office. He has mocked the established science of human-caused warming as a hoax, turned his pledge to pull the United States out of the Paris climate accord into a campaign rallying cry, and directed the Environmental Protection Agency to roll back nearly every federal policy designed to curb the heat-trapping fossil-fuel pollution that is the chief cause of global warming.

But Mr. Trump’s quest to tear down rules that restrict the fossil fuel industry has homed in on California as a particular target. That’s in part because of California’s unique role as a beacon of the nation’s climate change policies: Some signature federal climate change programs Mr. Trump seeks to dismantle originated in the state. And since Mr. Trump has vowed to pull the United States out of the international climate accord, California has actively sought to replicate and link its policies with other countries.

As Mr. Newsom sees it, there is a contradiction between Mr. Trump’s willingness to help fire victims and his refusal to address the underlying reasons for the increasing ferocity of the fires.

“Last night they approved seven additional emergency grants in record time,” Mr. Newsom, said. “But what’s so insidious, and what’s so remarkable is that he’s doing everything right to respond to these disasters and everything wrong to address what’s happening to cause them.”

Asked to respond, a White House spokesman, Judd Deere, said California’s leaders “support destructive liberal policies” and have not done enough to manage wildfire risks. “California should focus on its own affairs rather than trying to regulate 49 other states with its big-government policies.”