Canada's Ambassador to the U.S. Mark Wiseman warned on Wednesday that President Donald Trump's tariffs are driving up investment costs and discouraging business expansion, speaking at the B20 summit in Washington [1]. Wiseman, a former BlackRock executive who became ambassador in February, stated that "uncertainty increases your cost of capital" and that businesses are less likely to invest in new plants, ships, or R&D when facing tariff uncertainty [1]. His warning comes amid ongoing tensions between Washington and Ottawa over tariffs affecting one of the U.S.'s largest trading relationships, with the two countries exchanging roughly $570 billion in goods during the first nine months of 2026 [1]. However, this represents a decline compared to the same period during the previous three years under the Biden administration, though it increased from the same period in 2025 [1].
The tariff escalation has been dramatic: U.S. customs duties on Canadian imports reached $10 billion in 2025, compared with just $400 million in 2024, according to Congressional Research Service data [1]. New York Federal Reserve research from October found that nearly 90% of tariff costs were passed on to U.S. importers, with approximately a quarter of tariff increases eventually reaching consumer goods prices, with further price pressures expected in 2027 [1]. This research aligns with Labor Department data showing consumer prices rose a higher-than-expected 0.4% in October, adding to inflation concerns [1].
Trump has defended his tariffs as necessary to protect U.S. manufacturers and workers, accusing Canada of discriminatory trade practices [1]. The administration has imposed duties of up to 50% on certain Canadian products, prompting retaliatory measures from Canada targeting billions of dollars in U.S. exports [1]. The two governments have resumed negotiations after talks collapsed in August, with discussions focused on reducing tariffs on Canadian steel and automobiles [1]. Ambassador Wiseman called for the removal of tariffs imposed under Sections 232 and 338 of U.S. trade law, stating that a resolution would help businesses make long-term investment decisions [1]. The political landscape has shifted following the midterms, with Democrats preparing to challenge Trump's tariffs when they take control of Congress [1].
CONCLUSION
Canada's ambassador has highlighted how Trump's tariffs are creating investment uncertainty and raising costs for businesses, while Federal Reserve research confirms that tariff expenses are being passed to U.S. consumers with further price increases expected in 2027. With U.S. customs duties on Canadian imports surging from $400 million to $10 billion between 2024 and 2025, and ongoing negotiations between the two countries, the resolution of this trade dispute will be critical for both business investment decisions and consumer price stability heading into 2027.