Trump also threatened to impose a tariff of at least 25 percent on Apple if its iPhones sold in the U.S. are not manufactured in the country. Trump wrote on social media that he had told Apple CEO Tim Cook that his company would face a tariff hike if it continued to use foreign construction sites to assemble its technology.

Europe’s trade commissioner shared phone calls with Commerce Secretary Howard Lutnick and U.S. Trade Representative Jamieson Greer on Monday as both sides of the Atlantic seek to reach a trade deal and head off President Donald Trump’s sweeping tariff threat.