The province's top exports are untouched, but 130 trade categories worth tens of millions are squarely in the crossfire — and one Dartmouth machine shop already changed its supply chain because of it.

Nova Scotia offers one of the clearest province-level pictures of how unevenly the U.S.-Canada trade war is landing. The province's three biggest exports to the U.S. — tires, paper and seafood — are untouched by the current round of American tariffs. But of roughly 380 broad trade categories covered by the measures, Nova Scotia ships meaningful volumes in about 130 of them, concentrated in plastics, chemicals and telecommunications hardware, adding up to an estimated $279 million in affected trade.

A machine shop that already changed course

Ace Machining Ltd., a Dartmouth manufacturer, didn't wait to find out how the dispute would resolve. Co-owners told reporters that an ongoing procurement process would normally have involved American suppliers, but the company removed them from consideration once the first wave of tariffs hit — a small, concrete example of exactly the kind of supply-chain shift federal and provincial officials have been encouraging. Federal minister Sean Fraser, announcing tariff relief funding in Dartmouth, called it the right instinct even while acknowledging any single decision like it "will have very little effect" on its own.

The one plant everyone's watching

Fraser specifically flagged Nova Scotia's biggest single point of exposure: the Michelin tire plant in Granton, a major regional employer in an industry that, notably, sits outside the current tariff list. That's not an accident — tires are one of the province's untouched top exports — but it's also exactly why officials are watching it closely: a product category currently spared could just as easily end up targeted if the dispute escalates further, the way it already has for Canadian dairy, alcohol and vehicles nationally.

What the province is actually doing about it

Premier Tim Houston has kept a $50 million provincial contingency fund in reserve since the dispute began, telling reporters in September that none of it had yet been spent, even as he acknowledged how "stressful" the situation has become for family-owned businesses caught in a dispute "not of their doing." Houston has also been blunt about the political reality facing Nova Scotia businesses, saying he believes the trade war could persist "as long as Donald Trump" remains in office — a timeline that doesn't match the three-to-four-week resolution the president himself predicted this week.

For Nova Scotia businesses, the practical lesson from Ace Machining's experience is that waiting for clarity before adjusting a supply chain carries its own cost — the company acted on the first wave of tariffs rather than waiting to see whether later rounds would affect its specific suppliers, and officials are explicitly encouraging others to do the same rather than hold out for a resolution that, on current evidence, isn't close.