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Part of Pete Hoekstra, Mark Carney, and Donald Trump provided assessments on the status of the CUSMA trade deal, NATO, and the war in Iran.

How could U.S. tariffs on Canadian steel and aluminum affect Ontario's economy?

Likely What happens if… A possibility worth considering, not a forecast.

Ontario's manufacturers may face increased costs and restricted market access from U.S. tariffs The imposition of tariffs by the U.S. on Canadian steel and aluminum could negatively impact Ontario's industrial sector. These tariffs restrict market access and increase costs for specific Canadian exports, such as steel, aluminum, copper, and lumber, which are produced in the province. While most goods under the Canada-U.S.-Mexico Agreement (CUSMA) are exempt from the global 10 per cent tariff, the U.S. has continued to impose various tariffs citing national security concerns on these specific materials.

Reported by 3 independent outlets Written Oct 9
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How it reaches Ontario

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The facts so far

As reported. Each one links to where it comes from.

  • The U.S. has continued to impose various tariffs citing national security that affect Canadian exports such as steel, aluminum, copper and lumber.cp24.com
  • The Trump administration has imposed a global 10 per cent tariff on most imports under a different act, but most goods under the Canada-U.S.-Mexico Agreement (CUSMA) are exempt.cp24.com
  • Trump has slapped punitive tariffs on Canadian steel and aluminum amid Davos trade talks.montrealgazette.com

Why it matters

Ontario's economy relies heavily on its industrial and manufacturing base, which is deeply integrated into North American supply chains. The imposition of tariffs on key exports like steel and aluminum directly threatens the profitability and operational stability of these businesses, potentially leading to reduced production or job losses.

This situation highlights the fragility of the Canada-U.S. trade relationship, especially as the CUSMA review deadline approaches July 1. While Canada and Mexico seek a 16-year extension of CUSMA, the U.S. position remains unclear, making the provincial economy vulnerable to sudden shifts in U.S. trade policy.

What we don't know yet

  • Will the U.S. government adjust the tariffs on steel and aluminum before the CUSMA review deadline?
  • How will Ontario's businesses respond to the increased costs and restricted market access?

Is this still moving?

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What would change this answer

The U.S. government announces a renewal or modification of CUSMA.This would provide clarity on the trade environment, potentially mitigating the impact of the existing tariffs.
The U.S. government increases the tariffs on other Canadian manufactured goods.The negative economic pressure on Ontario's industrial sector would become significantly stronger and broader.

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Questions worth asking

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  • About Retaliatory Measures

    Given the U.S. tariffs on Canadian steel and aluminum, what kind of retaliatory measures might Canada implement against U.S. goods?

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Reporting

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The full eventUS-Canada Trade Tensions Persist Amid Tariff Discussions at Davos Everything aboutOntario

Brind's analysis is written by AI from the reporting linked above and can be wrong. This explainer is a possibility worth considering, not a forecast: steps marked as Brind's reasoning are not stated in the reporting. It is not investment advice; do your own research.