The Treasury secretary said that the President Trump and Xi Jinping of China have a good relationship but that he was not aware of a call, which Mr. Trump had alluded to last week.

Trump has enacted sweeping changes on a wide range of U.S. domestic and foreign policy priorities since taking office on January 20. He has upended the world economic order with tariffs, slashed the federal government with job cuts and done away with diversity programs in the public and private sector.