The president’s threats to slap duties on goods imported from the European Union are part of a pattern of directing the harshest penalties at the United States’ closest allies.

Prime Minister Keir Starmer had hoped to spend Monday marking a new milestone in the UK’s much-promised reset with European Union five years after Brexit. Instead, he received a dramatic reminder of how much harder that will be with Donald Trump back in the White House.

The European Union must remain united and avoid being naive in the face of threats by U.S. President Donald Trump to levy tariffs on its products, Spanish Economy Minister Carlos Cuerpo said on Monday.