WASHINGTON — U.S. President Donald Trump said Monday that he would double tariffs on Canadian vehicles beginning next year, as the neighboring coun...

The president announced the new levies, effective Jan. 1, after Canada said it would retaliate against duties the U.S. implemented over the weekend.

President Donald Trump threatened to double tariffs on Canadian cars on Monday, the latest sign that the United States and Canada are barreling toward a deeper trade war after…