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.

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.

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 posted letters to the leaders of Mexico and the European Union, saying they had not done enough to head off the new tariffs.

America’s biggest trading partners have tried tactics ranging from appeasement to retaliation to avoid higher tariffs. All find themselves faced with similar threats from Washington.

Businesses typically pass tariff costs onto consumers through higher prices. Sometimes, that process is less subtle.

Trump and his aides have repeatedly shifted their stance on tariffs since the president’s “Liberation Day” announcement.

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