Canadian prime minister Justin Trudeau is planning an immediate retaliation should US president Donald Trump impose a 25pc tariff on imports tomorrow, 1 February.
"If the president does choose to implement any tariffs against Canada, we are ready with a response," said Trudeau at a meeting of the Council on Canada-US Relations in Toronto. "A purposeful, forceful, but reasonable, immediate response."
"It's not what we want, but if he moves forward, we will also act," he said.
Trump has accused Canada and Mexico of facilitating trafficking of fentanyl and illegal migration and has threatened tariffs to persuade the two countries to tighten borders they share with the US.
"Our border is safe and secure," said Trudeau. "We're committed to keeping it that way by addressing current challenges and strengthening our capacity."
Mexican president Claudia Sheinbaum said this week Mexico is also ready to respond to US tariffs. "We will always defend respect for our sovereignty and a dialogue as equals, but without subordination," she said.
Canada in mid-December said it would spend C$1.3bn ($900bn) on border security measures over six years, which Trudeau reiterated Friday while highlighting recent progress. The 8,891-kilometre (5,525-miles) US-Canada border is the longest in the world.
Trump has also railed against the US' trade deficit with Canada, which is on track to settle at about C$65bn in 2024, according to TD Bank. The bank notes the deficit is largely a result of America's thirst for energy and should not be confused with a "subsidy".
Canada has increased deliveries of crude to the US beyond 4mn b/d and supplied 8.36 Bcf/d (86.35bn m³/yr) of natural gas in January-October, according to the US Energy Information Administration (EIA). US refiners that process Canadian crude would not easily find alternative supplies, according to the American Fuel and Petrochemical Manufacturers (AFPM).
"We won't relent until tariffs are removed, and of course, everything is on the table," Trudeau said of Canada's potential retaliation, a message that has drawn concern from the premier of oil-rich Alberta who wants the unfettered flow of energy.
All told, the two highly-integrated countries exchange about C$3.6bn of goods and services each day, only slightly less than daily US-Mexico trade, TD Bank said last week.