U.S. President Donald Trump has said he will impose tariffs on imports of steel and aluminium and raise rates to match those of other countries in the coming week. The United States and European Union have the world's largest commercial relationship,

The 25 percent tariffs on imported steel and aluminum are the latest salvo in his ongoing effort to overhaul the U.S. trading relationship with the rest of the world.

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.