The European Union has a “strong plan” to respond to tariffs imposed by US President Donald Trump but would prefer negotiations, European Commission chief Ursula von der Leyen said, The Guardian reports.

Von der Leyen, speaking at the European Parliament on Tuesday, said the next sectors to be hit with duties would be semiconductors, pharmaceuticals and timber.

The European Commission chief said many Europeans feel “utterly disappointed” by the U.S. statements.

“Europe did not start this confrontation. We don't necessarily want to impose retaliatory measures, but if it becomes necessary, we have a strong response plan and we will use it,” she said.

Trump has threatened to impose tariffs on goods from around the world starting Wednesday. His administration imposed tariffs on steel and aluminum imports in March and said increased duties on automobiles would take effect Thursday.