But if Mr Trump hits Europe with hefty tariffs, as he has just done on Canada, Mexico and China, the EU will aim to find common ground and respond with a mix of playing tough, giving in and embracing a degree of drama.

European leaders warned on Monday that U.S. President Donald Trump's threat to expand tariffs to the EU risked setting off a trade war that would cause economic harm on both sides of the Atlantic. European Union foreign policy chief Kaja Kallas said if the U.