A few hours after President Donald Trump announced that he would impose high tariffs on Canada, fans in the capital city of Ottawa booed athletes during a National Hockey League game against a visiting American team.
The fans' vocal discontent is a clear sign of Canadians' deep dismay at Trump's move to hit his closest ally with punitive tariffs, which threaten to spark an unprecedented trade war on the North American continent.
The 25 percent tariffs Trump imposed on all Canadian imports into the U.S. - with a lower 10 percent energy tax - are set to take effect on Tuesday, Feb. 4.
Trump is also strengthening the pressure, which is no longer dismissed as a joke, for Canada to join America and become the 51st state.
While many economists predict that the tariffs will also raise the cost of everyday items for Americans, from gas to groceries, Canada is more vulnerable. If they last for months, the country could fall into a painful economic recession.
Anger is growing - and with it the desire to fight back, echoed by political leaders in the country of 40 million people.
"Many of us will be affected by this and difficult times lie ahead. I ask you to be there for each other," Prime Minister Justin Trudeau said in a Saturday evening address.
"Now is the time to choose Canada."

Some Canadians have already heeded calls for solidarity.
Guides are circulating on social media about how to avoid American-made products.
One local Toronto grocery store has even started labeling Canadian yogurt for customers, according to an image posted to the social network X (formerly Twitter) by Toronto doctor Iris Gorfinkel.
Others have said they will cancel travel plans to the United States (US) or abandon the visit altogether.
"Yesterday, in response to Trump's tariffs, we canceled our March family vacation to the US," Seth Klein, a Canadian writer, wrote on the social media site Bluesky on Sunday.
"I had a small loss due to the cancellation of the train tickets, but it had to be done."
In some Canadian provinces, American alcoholic beverages will be pulled from shelves indefinitely starting Tuesday.
This is in addition to a total of 155 billion Canadian dollars (103 billion euros) of American goods that Canada said it would impose tariffs on in retaliation, including vegetables, clothing, sporting goods, perfumes and other items.
Goods coming from Republican-led states, such as orange juice from Florida, are particularly targeted.
The US imports more oil from Canada than any other country, and the Trudeau government has signaled that "all options remain on the table" for further retaliation.
A moment of destabilization for Canada
Trump's threats of high tariffs, long speculated to be a negotiating tactic to extract concessions on border security, have confused Canadians, who have enjoyed close economic, social and security ties with the US for decades.
"It's a shock," Michael Ignatieff, former leader of Canada's Liberal Party, told the BBC.
"We are in a new world, in which the question of whether you can trust America is becoming fundamental to every country's foreign policy."
Pierre Polievre, leader of Canada's opposition Conservative Party, called the tariffs "massive, unfair and unjustified" on Sunday.
"Canada is the United States' closest neighbor, greatest ally and best friend," he said.
He noted that Canada fought alongside the US in two world wars, as well as in Korea and Afghanistan.
"There is no justification for this treatment."
Prime Minister Trudeau questioned in a speech on Saturday why the US would target Canada instead of looking at "more challenging parts" of the world.
Part of his speech was directly addressed to the Americans, and he also recalled the history of shared bloodshed.
"We fought and died alongside you," Trudeau said.
Thomas Juneau, a professor at the University of Ottawa who studies national security, told the BBC that Trump's tariffs "undoubtedly represent an earthquake in Canada-US relations."
"This is extremely destabilizing for Canada," Juneau stressed.
"As a country, we have benefited greatly from an exceptionally close trade and security partnership with the US for decades."
While a trade battle would likely force Canada to look elsewhere for partners, it ultimately cannot escape geography, he added.
It will remain dependent on a neighboring economic superpower.
"That's why Canada absolutely needs to focus now on saving the relationship as much as possible," Juneau said.

An unclear, expensive fight
It remains a big unknown how long the US will keep the tariffs in place and what steps Canada might take to appease the Trump administration, which has said it expects action against cross-border fentanyl trafficking and illegal migration.
TD Economics predicts that the longer the tariffs remain in place, the worse the impact will be.
Canada could enter a recession in five to six months, and its unemployment rate could reach more than seven percent.
Theo Argitis, CEO of Ottawa-based public relations firm Compass Rose Group, said Canada was left with no choice "but to hit back hard at (Trump)."
"Ultimately, we don't really know why it does this," Argitis told the BBC.
Trump says the flow of fentanyl, a deadly drug, into the US from Canada and Mexico is one of the key reasons.
US officials say the tariffs will remain in place "until the crisis abates."
In response, the Canadian government noted that less than one percent of fentanyl and illegal border crossings into the U.S. come from Canada.
She offered to spend an additional 1,3 billion Canadian dollars to secure the US-Canada border.
But Trump has also spoken publicly about his frustration with the trade deficit between Canada and the US and his view that tariffs could be a source of revenue for Washington.
On Sunday it's on his social network Social Truth wrote that the US does not need Canadian products and said that they pay "hundreds of billions of dollars to subsidize Canada."
"Without this huge subsidy, Canada ceases to exist as a viable country," Trump wrote, before reiterating his position that it should instead become a US state.
He warned that the White House would impose harsher penalties on Canada if it decides to retaliate.
For now, Canada has decided to try to inflict some pain on its more powerful neighbor, even if it tips the economic scales in the opposite direction.
"We prefer to resolve our disputes through diplomacy," Trudeau said on Saturday.
"But we are ready to fight when necessary."
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