U.S. President Donald Trump is trying to create uncertainty in his trading partners to knock them off balance and weaken their negotiating position, Canadian Prime Minister Justin Trudeau said.

Trump caused volatility in currency markets by signaling Monday evening that his administration might impose tariffs of as much as 25% on Mexico and Canada as early as Feb. 1. That timeline appeared to conflict with an executive order he signed that directed U.S. officials to review trade and border relationships and report back by April 1.

“We know that there is always going to be a certain amount of unpredictability and rhetoric coming out from this administration,” the prime minister said Tuesday in Quebec. Trump is a “skilled negotiator and will do what he can to keep his negotiating partners a little off balance,” Trudeau added.

Mexican President Claudia Sheinbaum struck a similar note, telling reporters: “It’s important to always keep a cool head and refer to the signed orders beyond the actual rhetoric.”

Trudeau, who is set to leave office in March, said his government is prepared to “support and compensate” Canadian citizens and businesses if Trump proceeds with tariffs that harm the economy. But he also promised strong retaliation measures.

The Canadian government has prepared a number of tariff lists against U.S.-manufactured items depending on what Trump does. If the U.S. proceeds with tariffs that are targeted on a limited range of Canadian goods, Trudeau’s plan is to place tariffs on a relatively small number of U.S. items — including consumer products.

If Trump moves ahead with broad 25% tariffs, however, Canada has a much longer list of items for retaliation, worth $105 billion in U.S.-made items across a broad range of categories, including steel and aluminum.

But retaliation would come at a heavy cost for Canada, too, pushing up costs for its consumers and businesses and worsening the economic blow.

In 2019, the Bank of Canada modeled a scenario in which the U.S. applies 25% tariffs and faces an equal response from affected trading partners. Canada’s GDP would take a 6% hit, a bigger drop in GDP than in any recession excluding the downturn that coincided with the COVID-19 shock, and the loonie would also depreciate by 25%, the bank estimated at the time.

The U.S. runs a trade surplus with Canada in many industries, including manufacturing, but overall it has a trade deficit because it imports so much Canadian oil and gas.

“Everything is on the table, and I support the principle of dollar-for-dollar matching tariffs,” Trudeau said, reiterating that he hopes to avoid a trade war.

Mark Carney, who’s running to replace Trudeau as Liberal Party leader and prime minister, called Trump’s outlined tariffs “illegal” and said he supports dollar-for-dollar retaliation. Chrystia Freeland, the former finance minister who is Carney’s main rival in the race, has taken a similar position.