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Canada's response will start with tariffs on $30 billion worth of goods immediately, with tariffs on the remaining $125 billion on American products following 21 days later.

"Our tariffs will remain in place until the U.S. trade action is withdrawn, and should U.S. tariffs not cease, we are in active and ongoing discussions with provinces and territories to pursue several non-tariff measures," Trudeau said. "While we urge the U.S. administration to reconsider their tariffs, Canada remains firm in standing up for our economy, our jobs, our workers, and for a fair deal."

Trudeau is set to hold a press conference Tuesday morning along with Finance Minister Dominic LeBlanc, Foreign Affairs Minister Mélanie Joly and Public Safety Minister David McGuinty.

U.S. President Donald Trump said 25 per cent across-the-board tariffs on imports from Canada and Mexico, with a lower 10 per cent levy on Canadian energy, will start Tuesday, tipping the continent into a trade war.

"No room left for Mexico or for Canada (to make a deal)," Trump said at the White House on Monday.

Trump's executive order to implement economy-wide tariffs was delayed for a month after Canada and Mexico agreed to introduce new security measures at the border.

A White House official confirmed on background Monday that the wording in the executive order means the tariffs kick in at midnight.

The order initially tied the tariffs to the illegal flow of people and drugs across the borders — but Trump previously said the delay would allow time for an "economic" deal.

"What they'll have to do is build their car plants, frankly, and other things in the United States, in which case you have no tariffs," Trump said Monday while speaking about the tariffs on Canada and Mexico.

Trump later added that deadly fentanyl continues to flow into the United States from Canada, Mexico and China.

In his statement, Trudeau said there is "no justification for these actions." 

“While less than one per cent of the fentanyl intercepted at the U.S. border comes from Canada, we have worked relentlessly to address this scourge that affects Canadians and Americans alike," Trudeau said, highlighting the government's $1.3 billion border plan.

Trudeau said the tariffs would cause Americans to pay more for groceries, gas and cars and "potentially lose thousands of jobs."

"Tariffs will disrupt an incredibly successful trading relationship," Trudeau said. "They will violate the very trade agreement that was negotiated by President Trump in his last term.�

Foreign Affairs Minister Mélanie Joly said if the levies go into force, Ottawa will revive its previously announced plan for retaliatory tariffs. 

"We are ready," Joly said as she entered a Canada-U. S. cabinet committee meeting in Ottawa earlier on Monday.

Ontario Premier Doug Ford said his province also would retaliate by removing American alcohol from Liquor Control Board of Ontario shelves and ripping up a $100-million deal with Elon Musk's SpaceX to provide Starlink internet service in remote areas.

Ford also repeated his threat to shut off the electricity Ontario supplies to several U.S. states.

"If they want to try to annihilate Ontario, I will do everything, including cut off their energy, with a smile on my face," he said.

Canadian officials and premiers made a month-long diplomatic push in Washington but it remains unclear what Canada could do to persuade Trump to drop the tariffs.

Joly said Canada has responded to the president's concerns about the border. 

Canada named a new "fentanyl czar," listed Mexican cartels as terrorist groups and launched a Canada-U. S. joint strike force to combat organized crime, fentanyl and money laundering. More helicopters and drones were launched and additional officers were tasked with guarding the border.

Immigration Minister Marc Miller said earlier Monday that the Trump administration was using uncertainty as a bargaining tool and he hoped logic would prevail.

Many Canadian officials have said that Trump's ongoing tariff threats are tied to an upcoming mandatory review of the Canada-U.S.-Mexico Agreement. The continental trade pact was negotiated under the first Trump administration to replace the North American Free Trade Agreement.

The president's comments came just hours after a key member of his team said no decision had been made and tariff levels could still be lowered.

U.S. Commerce Secretary Howard Lutnick told CNN on Monday morning that Canada and Mexico had done a good job of enhancing border security but more needed to be done to stop the flow of fentanyl.

New York State Gov. Kathy Hochul told CNN that the small volume of drugs that may be coming across the northern border does not "justify the cataclysmic impact that tariffs will have."

U.S. Customs and Border Patrol data shows the number of people and drugs crossing illegally into the United States from Canada is minuscule compared to the volume coming across the southern border. It reports just 13.6 grams of fentanyl seized by northern Border Patrol staff in January.

Republican strategist Doug Heye said that "Trump wants to be able to declare a victory — regardless of what that victory may be — and is using tariff threats to leverage that victory."

"But we know that should (the tariffs) go into effect, they become a de facto tax increase on American families who can ill afford higher costs on anything," Heye added.

A report issued by the Peterson Institute for International Economics last month said Trump's tariffs on Canada, Mexico and China would cost the typical U.S. household more than US$1,200 a year.

Trump returned to the White House in January with a growing tariff agenda. On Monday, Trump said tariffs are "easy, they're fast, they're efficient and they bring fairness."

He ordered 25 per cent tariffs on all steel and aluminum imports into the United States on March 12 and signed an executive order to implement "reciprocal tariffs" starting April 2.

Trump also floated the idea of imposing tariffs on automobiles and signed executive orders to look into levies on copper and lumber.

On Monday, he added agricultural products to his growing list of tariff targets.

"To the Great Farmers of the United States: Get ready to start making a lot of agricultural product to be sold INSIDE of the United States," Trump posted on social media. "Tariffs will go on external product on April 2nd. Have fun!"

- With files from Alison Jones in Toronto

This report by °µÍø½ûÇø was first published March 3, 2025.