Further afield, European economies are also at risk from Trump's tariff regime. The U.S. president told reporters on Sunday that tariffs on the EU "will definitely happen" — but said a deal "could be worked out" with the U.

Punishing 25% levies on imports from America’s closest neighbors were due to come into force at 12:01 a.m. ET Tuesday, but Trump put his two-front trade war on hold, claiming he’d scored two big wins and major concessions.

Trump's tariffs on Canada, Mexico and China suggest he is willing to risk a global trade war. The main thing that could stop him would be a stock market selloff.