Expert analyzes possible US exit from Paris climate accord Donald Trump is keeping the world guessing about US withdrawal from the Paris climate accord, as aides reportedly said a pullout was likely and the president said a decision would come in the "next few days." Alden Meyer, of the Union of Concerned Scientists, says that even if President Trump pulls the United States government out of Paris, that doesn't mean that the United States as a whole is pulling out.IMAGES AND SOUNDBITES