Mexico and Canada are the United States’ top two trading partners, accounting for nearly 30% of trade volumes.

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.

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.