Canada and the European Union hit back with retaliatory tariffs Wednesday, as the 25% tariffs on all steel and aluminum imports into the U.S. came into effect.

To date, Trump’s tariffs have targeted Canadian goods that include steel, aluminum, energy and the auto industry. After threatening a 50% tariff early last week on the country’s steel and aluminum, he reduced it to 25% days later after Canada retaliated, then pushed to April 2 the full 50% tariff.