The president-elect’s market-friendly appointments to Treasury and other agencies brought relief to investors. The trade threat suggests that might be premature.

With a Monday evening promise on Truth Social that his incoming administration will slap 25 percent tariffs on all goods from Canada and Mexico — as well as increasing already existing tariffs on China — Trump sent reporters (and investors,

Justin Trudeau, Canada's prime minister, told reporters on Tuesday that he had a "good" conversation with Trump following the president-elect's post.