Donald Trump’s decisive victory is a stunning setback for the fight against climate change. The Republican president-elect’s return to the White House means the US is going to squander precious momentum, unraveling hard-won policy progress that was just beginning to pay off, all for the second time in less than a decade.

President-elect Donald J. Trump promised to delete climate policy. He could face pushback from Republicans benefiting from a boom in clean energy.

When they list measures that are making the most difference, it lines up with policies and agencies Trump has said he'll target: President Joe Biden’s landmark climate law, which is funneling money to energy measures that combat climate change,