While the president has threatened to ratchet up duties against both in recent weeks, he has yet to take direct aim at them.

In a late-night social media post, the president said he would impose “large scale” tariffs if Canada and the European Union allied to “do economic harm” to America.

The new levies on cars and light trucks will take effect on April 3, the day after Trump plans to announce reciprocal tariffs aimed at the countries responsible for the bulk of the U.S. trade deficit.