WASHINGTON — President Trump said on Thursday he would withdraw the United States from the landmark 2015 global agreement to fight climate change, a move that fulfilled a major campaign pledge but drew condemnation from U.S. allies and business leaders. Trump, tapping into the “America First” message he used when he was elected president last year, said the Paris accord would undermine the U.S. economy, cost U.S. jobs, weaken American national sovereignty and put the country at a permanent disadvantage to the other countries of the world. “We don’t want other leaders and other countries laughing at us any more. And they won’t be,” Trump said. “The same nations asking us to stay in the agreement are the countries that have collectively cost America trillions of dollars through tough trade practices and in many cases lax contributions to our critical military alliance,” Trump added. Supporters of the accord, including some leading U.S. business figures, called Trump’s move a blow to international efforts to curb the warming of the planet that threatens far-reaching consequences for this century and beyond. Former President Obama expressed regret over the pullout from a deal he was instrumental in brokering. “But even in the absence of American leadership; even as this administration joins a small handful of nations that reject the future; I’m confident that our states, cities, and businesses will step up and do even more to lead the way, and help protect for future generations the one planet we’ve got,” Obama said. “Today’s decision is a setback for the environment and for the U.S.’s leadership position in the world,” Goldman Sachs Group Inc Chief Executive Lloyd Blankfein wrote on Twitter. Trump said his administration would begin negotiations either to re-enter the Paris accord or to have a new agreement “on terms that are fair to the United States, its businesses, its workers, its people, its taxpayers.” He complained in particular about China’s terms under the agreement. International leaders, including the pope, had pressed Trump not to abandon the accord. Italian Prime Minister Paolo Gentiloni, German Chancellor Angela Merkel and French President Emmanuel Macron said in a rare joint statement the agreement could not be renegotiated and urged their allies to hasten efforts to combat climate change. They pledged to do more to help developing countries adapt. “While the U.S. decision is disheartening, we remain inspired by the growing momentum around the world to combat climate change and transition to clean growth economies,” said Canadian Prime Minister Justin Trudeau. With Trump’s action, the United States will walk away from nearly every other nation in the world on one of the pressing global issues of the 21st century. Syria and Nicaragua are the only other non-participants in the accord. “We’re getting out,” Trump said at a ceremony in the White House Rose Garden under sunny skies on a warm June day. “I was elected to represent the citizens of Pittsburgh, not Paris,” the Republican president said. Pittsburgh’s mayor, Democrat Bill Peduto, shot back on Twitter that his city, long the heart of the U.S. steel industry, actually embraced the Paris accord. The spokesman for U.N. Secretary-General Antonio Guterres called the action a “major disappointment.” The U.N. body that handles climate negotiations said the accord could not be renegotiated based on the request of a single nation.