The Office of the U.S. Trade Representative is set to open a probe into China’s compliance with the phase-one trade agreement reached during President Trump’s first term, according to a source familiar with the investigation. The probe will be filed under Section 301 of the Trade Act of 1974 and could be announced on Friday, the source said. The New York Times reported the planned investigation earlier on Thursday. The probe comes ahead of a much-anticipated meeting between President Trump...