The unjustified tariffs on the EU would trigger firm and proportionate countermeasures, Ursula von der Leyen said in a statement.

The President of the European Commission, Ursula von der Leyen, has announced that the U.S. decision to impose tariffs on European steel and aluminium exports will not go unchallenged. "I deeply regret the U.

The 25 percent tariffs on imported steel and aluminum are the latest salvo in his ongoing effort to overhaul the U.S. trading relationship with the rest of the world.