“The 1992 UNFCCC serves as the international structure for efforts by 198 countries to slow the rate of rising climate pollution. It has universal participation. The U.S. was the first industrialized nation to join the treaty following its ratification under former President George H.W. Bush — and it will be the only nation ever to leave it.
The move marks an intensifying effort by Trump to topple climate efforts compared to his first term, when he decided against quitting the treaty.
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Since taking office for a second time a year ago, the Trump administration has tried to undermine U.S. and international climate efforts by shuttering offices throughout the federal government and threatening to unleash tariffs on countries that support carbon taxes on shipping emissions.
He has overseen a wide-ranging campaign to erase regulations governing climate pollution at power plants and in cars, and his administration recruited high-profile climate contrarians to write a report that promoted misinformation about the tenets of climate science.
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The U.S. Senate ratified the U.N. framework 34 years ago, making it a rare environmental pact that was supported unanimously. That could complicate any future president’s efforts to rejoin the treaty.
Some legal experts say the Senate’s consent does not operate in perpetuity after the U.S. leaves a treaty. Others argue that if a president can unilaterally leave a treaty, a future president could rejoin it without a new vote.”
https://www.politico.com/news/2026/01/07/rubio-urges-trump-to-leave-unfccc-00487331