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 auto tariffs are straining relations with U.S. allies and deepening doubts about America’s reliability as a partner.
Leaders in both countries warned that tariffs would fan inflation in the United States and upend global supply chains.
European leaders are struggling to find the money and the political will to replace the bulk of the U.S. contribution to Ukraine and to their own defense.