President Donald Trump on Saturday threatened duties of 30% on products from Mexico and the European Union, two of America’s biggest trading partners, in an ongoing tariff campaign that’s upended global trade since he retook office in January.

President Donald Trump prides himself on being a dealmaker, but his negotiating style is more ultimatum than compromise. In the last week, Trump has slapped trading partnerswith tariffs rather than slog through prolonged talks to reach agreements.