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 pauses—which allow a period of negotiations over drug trafficking and border security—provide a cool-down period after a tumultuous few days that put North America on the cusp of a trade war.