The president-elect’s opening salvo in trade and border talks with the United States’ neighbors is casting a harsh light on the North American alliance.

A post on Truth Social by President Elect Donald Trump shattered the calm that had fallen on Washington DC in the days ahead of the Thanksgiving holiday when the U.S. Congress was in recess. The post read:

Trump said Monday on Truth Social that one of his first executive orders would be to hit Mexico and Canada with a blanket 25% tariff. Mexico and Canada are the second and third top suppliers of goods to the U.S., according to the Office of the U.S. Trade Representative. The U.S. imports the most goods from China.