The deal that was supposed to delay a Canada-U.S. trade war appeared to be cracking on Monday, as officials watched to see whether President Donald Trump would be making good on his threat of imposing 25 per cent tariffs on steel and aluminum imports.

Steel and aluminum are heavily used in the automotive and construction industry, but are also used to manufacture goods and appliances. The decision mirrors the actions Trump levied during his first Administration, when he enacted a 25% tariff on steel and 10% tariff on aluminum, though some countries, including South Korea were exempt.

Starting Tuesday, nearly all imports from Canada and Mexico will be charged a 25% tariff, while goods from China will be charged a 10% tariff.

The move likely will trigger retaliation and risk igniting a trade war that could cause broad economic disruption for all countries involved.

Steep new tariffs on goods coming from Canada, Mexico and China are taking effect Saturday — and although the details are still unclear, experts are worried about the impact on the national economy and the north country.

U.S. President Donald Trump said over the weekend he will formally announce 25 per cent tariffs on all steel and aluminum imports today, including for Canada and Mexico.

President Trump says he plans to impose a new 25% tariff on steel and aluminum imports including from Canada and Mexico.

Washington: President Donald Trump said he will announce on Monday that the United States will impose 25% tariffs on all steel and aluminum imports, including from Canada and Mexico, as well as other import duties later in the week.