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.

Some investors and economists have also noted Trump's pattern of backing off his tariff threats. Reuters, the news and media division of Thomson Reuters, is the world’s largest multimedia news provider,

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.

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 released two tariff letters on Saturday, imposing duties of 30% on products from Mexico and the European Union.

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

The European Union has decided to hold off on imposing retaliatory tariffs on U.S. goods that were set to begin Monday

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.