U.S. stock futures fell Sunday, a day after President Donald Trump threatened to impose new 30% tariffs against imports from Mexico and the European Union.

Mexico and Europe are grappling with how to respond to a U.S. administration that is using trade policy for a range of political and economic objectives.

Gold gained, bolstered by haven demand as traders weighed fresh tariff threats from President Donald Trump after he declared a 30% rate for the European Union and Mexico effective next month.

If a 30 percent tariff on Mexico goes into affect on August 1, a wide variety of foods will be more expensive, experts warn.

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.

Financial markets, which have shown increasing insensitivity to tariff threats from the US, will face a test at the Monday open after President Donald Trump declared a 30% rate for the European Union and Mexico effective Aug.

Plus, the Justice Department has subpoenaed 20 doctors and clinics involved in “performing transgender medical procedures on children.”

President Trump sent tariff letters to more than 20 countries urging them to reach trade deals with the U.S. by Aug. 1, further escalating threats to partners including Canada. Trump also announced a 50% tariff on copper imports.