Canada and the US worked together during Trump's first presidency when re-negotiating the North American Free Trade Agreement. Trump threatened to use tariffs then as well. His threat of tariffs on imports from Mexico led to an expansion of the Migrant Protection Protocols program across the US-Mexico border.

President-elect Donald Trump's threat to impose tariffs on Canada, China and Mexico on the first day of his administration could dramatically raise prices for Americans on everything from cars to clothes to oil.

Canadian Prime Minister Justin Trudeau says if President-elect Donald Trump follows through on this threat to impose sweeping tariffs on Canadian products he would be raising prices for Americans and