Canadian Prime Minister Justin Trudeau flew to Florida and met with Donald Trump at his Mar-a-Lago club on Friday evening, less than a week after the U.S. president-elect threatened heavy tariffs on imports from North American trading partners.

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.

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.