Threats by President-elect Donald Trump to impose U.S. tariffs on its immediate neighbors appear to have created a split between Canada and Mexico, after Canadian officials said problems with the two countries' borders were not comparable.

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.

Last Monday on the website Truth Social, President-elect Donald Trump made clear his intention to impose a substantial tariff on products imported to the United States from Canada and Mexico. Trump announced his tariff plan after alleging that "thousands of people are pouring through Mexico and Canada,