In a significant turn of events, U.S. President Donald Trump has pledged to intensify the imposition of sector-specific tariffs following a Supreme Court ruling that curtailed his authority to levy existing tariffs. This decision poses fresh challenges for the Canadian economy, which has already been grappling with the impact of U.S. tariffs targeting key industries such as automotive and steel.
Supreme Court Ruling and Its Implications
On Friday, the U.S. Supreme Court ruled against Trump’s application of tariffs under the International Emergency Economic Powers Act, which had generated over $134 billion for the U.S. government during his presidency. In response, Trump announced plans for a new blanket 10% global tariff aimed at revitalising his trade policies. However, these tariffs are set to expire in 150 days unless Congress votes to extend them. Notably, most Canadian goods will retain tariff-free access to the U.S. market due to exemptions under the US-Mexico-Canada Agreement (USMCA).
Candace Laing, President and CEO of the Canadian Chamber of Commerce, warned that Canada must brace itself for new, more aggressive trade measures that could have widespread and disruptive effects. The existing Section 232 tariffs on steel, aluminium, automobiles, and other products have already inflicted significant damage on Canadian industries.
The Role of Sector-Specific Tariffs
The sectoral tariffs implemented under Section 232 of the U.S. Trade Expansion Act of 1962 have been particularly detrimental to Canada, which has seen targeted duties significantly affect its economy. Current U.S. tariffs cover a variety of products, including steel, aluminium, and automotive parts.
Before any new tariffs can be enacted, the U.S. Commerce Department is required to conduct formal investigations and produce findings. Nine new national security investigations have been launched, covering sectors such as semiconductors, pharmaceuticals, and critical minerals. Four of these investigations were scheduled for completion, but the absence of final reports suggests that the Trump administration may be waiting for the Supreme Court ruling before announcing additional tariffs.
According to Michael Gregory, Deputy Chief Economist at Bank of Montreal, the administration’s strategy appears to involve a coordinated push for new sectoral duties in the wake of the court’s decision.
Potential Economic Impact on Canada
While it is challenging to quantify the potential impact of these tariffs, estimates indicate that approximately $160 billion worth of Canadian imports could be affected. This figure is based on trade data from 2024, with the Council on Foreign Relations suggesting that even smaller sectors under investigation could pose significant risks.
For instance, while Canada exported only $32 million of polysilicon to the U.S. in 2024, it was also the largest supplier of commercial aircraft and jet engines to the U.S., a sector already facing threats from Trump’s administration. Last month, Trump hinted at decertifying Canadian aircraft unless certain U.S.-made jets received approval from Transport Canada.
Similarly, investigations into the robotics and industrial machinery sectors could adversely affect Canada’s manufacturing base, with exports in these categories valued at $4 billion. The pharmaceutical sector, while primarily reliant on imports from countries like China and India, also relies on Canadian suppliers, which contributed approximately $6.75 billion in products to the U.S. market in 2023.
Expanding the Trade War
In addition to the proposed global tariff and heightened Section 232 measures, Trump has signalled intentions to initiate Section 301 investigations into various countries to address perceived unfair trading practices. This avenue has primarily targeted China, but Brazil is also under scrutiny.
Timothy Keeler, a trade lawyer and former U.S. Trade Representative official, noted that these investigations could encompass a wide range of grievances, including Canada’s supply management system for dairy, import restrictions, and provincial trade regulations. As the Trump administration seeks to replicate the approach taken with tariffs under the International Emergency Economic Powers Act, the long-term implications for trade relations with Canada remain uncertain.
Why it Matters
The potential resurgence of sector-specific tariffs poses a formidable challenge for the Canadian economy, already beleaguered by existing trade tensions. With the U.S. reasserting its protectionist stance, Canada must navigate a landscape fraught with uncertainty. The ramifications could extend beyond immediate economic impacts, potentially straining diplomatic relations and provoking retaliatory measures from Canada. As both nations grapple with these evolving trade dynamics, the stakes for industries on both sides of the border have never been higher.
