The European Commission said on Monday it would make a strong case this week for the United States to reduce or eliminate tariffs even after Donald Trump said he would double import duties on steel and aluminium to 50%.

The European Union is preparing “countermeasures” against the United States if the two sides cannot reach a deal after surprise U.S. tariffs on steel rattled global markets and complicated the ongoing negotiations between Brussels and Washington.

The European Union on Monday said it is preparing “countermeasures” against the United States after the Trump administration’s surprise tariffs on steel rattled global markets