Commission President Ursula von der Leyen said unjustified tariffs would prompt "proportionate and decisive countermeasures", echoing her vow on Tuesday of a "firm and proportionate" response to Trump's decision to impose tariffs on all steel and aluminum imports.

The European Union's executive branch on Friday vowed to “take firm and immediate action" against U.S. President Donald Trump’s imposition of tariffs on steel and aluminum. The European Commission said in a statement that Trump’s proposed “reciprocal” trade policy goes “in the wrong direction.

European Commission President Ursula von der Leyen said during the Munich security conference Friday the European Union will respond if the United States imposes reciprocal tariffs.