"Canada has been ripping off the United States of America for years," Trump posted on social media Monday morning.

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…

President’s justification for starting the trade war is not based in reality