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 warning landed after Trump had already announced plans to impose an additional 25 percent tariff on hundreds of billions of dollars’ worth of imported cars and auto parts. The move is set to affect key U.S. trading partners, including Mexico, Canada, South Korea, Japan and Germany.

President Trump on Thursday threatened to impose larger tariffs on the European Union and Canada if they team up against the U.S., as an escalating trade war with the two allies continues. “If the