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 has vowed to “take firm and immediate action” against U.S. President Donald Trump’s imposition of tariffs on steel and aluminum.

The European Union can negotiate on reciprocal tariffs with the United States but will not give up its right to regulate in areas such as taxation and digital platforms, the chair of the European Parliament's trade committee said on Friday.