TORONTO — Roughly $900 billion in annual trade between Canada and the United States — and with it, traditionally chummy bilateral ties — is on the brink of upheaval, with President Donald Trump threatening to impose sweeping tariffs on Canada as early as this weekend.

BMW's plant in San Luis Potosi, Mexico, produces the 3 Series, 2 Series Coupe and M2, with nearly all output going to the U.S. and other markets worldwide, according to the carmaker. From 2027, it will produce the all-electric Neue Klasse model line.