If Canada seeks to retaliate over U.S. president-elect Donald Trump's tariff threat, the government should hit the U.S. where it hurt would both economically and politically, some trade experts suggest.

While the announcement is almost certainly bluster to bring attention to illegal immigration and fentanyl smuggling, there are several reasons why it is so risky.

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.