Stone-faced as he stared into a gaggle of cameras on Tuesday, the leader of Canada’s largest province laid bare how it feels to be America’s northern neighbour and closest ally this week.“It’s like a family member stabbing you right in the heart,” said Ontario’s premier, Doug Ford. A day before, president-elect Donald Trump had pledged hefty tariffs on Mexico and Canada, the US’s two largest trading partners. “It’s the biggest threat we’ve ever seen … It’s unfortunate. It’s very, very hurtful.”For both Mexico and Canada, whose economic successes are enmeshed in their multibillion-dollar trade relationships with the United States, the forecasted chaos and disruption of a second Trump term has arrived. And the first salvo from Trump has already forced leaders from Mexico and Canada to revisit their relationship with the US – and with each other.Both have maxims to describe living in the shadow of the world’s largest economic and military superpower, which sees nearly $2tn worth of goods and services pass through its two land borders.“Living next to you is in some ways like sleeping with an elephant,” the late prime minister Pierre Trudeau told then US president Richard Nixon. “No matter how friendly and even-tempered is the beast, if I can call it that, one is affected by every twitch and grunt.”For Mexicans, it is the words of the 19th-century dictator Porfirio Díaz: “Poor Mexico: so far from God, so close to the United States.”The vagaries of the relationship were tested again this week when Trump threatened in a social media post to apply devastating levies of 25% on all goods and services from both countries, and to keep them in place until “such time as drugs, in particular fentanyl, and all illegal aliens stop this invasion of our country!”Although in 2018 the US, Canada and Mexico renegotiated the Nafta trade pact that Trump had long blamed for gutting US manufacturing, the three countries still have deeply intertwined supply chains – especially an automotive industry that spans the continent – making a levy of that magnitude potentially devastating to all.In Canada, Trump’s demands have left the government scrambling to make sense of the threat – and how seriously to take it.“‘Good-faith negotiator’ is not usually a descriptor of Donald Trump. He loves to disrupt it. He loves to divide and conquer,” said Colin Robertson, a former senior Canadian diplomat who has had numerous postings in the US. “Trump is determined to truly make his mark. Last time he was disorganized. This time, he’s certainly started off demonstrating a high degree of organization.”Even before Trump’s announcement, the Canadian prime minister, Justin Trudeau, and a handful of provincial premiers had mused openly about cutting Mexico out of future trade talks, instead pivoting towards a Canada-US trade pact – a move that Mexico’s lead negotiator called a “betrayal”.On Wednesday, Trudeau held an emergency meeting with all 10 premiers to push a “Team Canada” approach to the confrontation, pledging hours later to invest more in border security – a nod to Trump’s criticism of Canada’s patrolling of its border.A challenge for Canada is a need to approach Trump with skepticism, but also to take the threats seriously, says Robertson, adding that Canada’s trade relationship with the US is immensely lopsided. “The reality is, we need them. They’re big, we’re small.”Still, Trump’s demands “are perverse, but unfortunately predictable”, says Roland Paris, director of the Graduate School of Public and International Affairs at the University of Ottawa and former foreign affairs adviser to Trudeau.He notes that only a sliver of the fentanyl entering the US comes from Canada, a figure so small the US Drug Enforcement Administration (DEA) does not even mention Canada in a report from 2020. As for migrants entering the US, Canada’s federal minister says yearly interceptions are similar to a “significant weekend” at the Mexico border.“This is [Trump’s] modus operandi,” said Paris. “He’s not wasting any time throwing America’s principal trading partners off balance, before he even enters office.”Ottawa’s efforts to smooth things over with Trump are also hampered by domestic politics. Trudeau remains immensely unpopular in polls, and the rival Conservatives have cast the prime minister as weak and ill-equipped to both preserve what Nixon called Canada’s “special relationship” with the US and to face off against a mercurial president.Paris imagines the prime minister’s cabinet, especially veterans of bruising negotiations with Trump during his first term, as “determined” to manage relations with a country that for decades has remained a staunch ally. He says years of close work has produced a significant overlap in policy goals for the two nations, including skepticism of China and a need to secure critical mineral and energy supply chains.skip past newsletter promotionafter newsletter promotion“Canada is going to need resolve, patience and the most far-reaching advocacy campaign this country has ever conducted in the United States,” he said. “But everybody knows that Trump is so unpredictable that there’s no saying what he might do this time.”For Mexico, which has long borne the brunt of Trump’s ire, Monday’s tariff threat comes amid already tense relations, including a reform to elect almost all judges by popular vote that has drawn sharp criticism from the US. At the same time, the arrest in July of two top Sinaloa cartel bosses in Texas, a move that surprised Mexican officials, has triggered a bloody gang war that the Mexican president, Claudia Sheinbaum, blames on the US.On Wednesday, Sheinbaum spoke with Trump, a conversation which the US president-elect characterised as “wonderful” after he claimed the Mexican president pledged to “stop Migration through Mexico, and into the United States, effectively closing our Southern Border”. Sheinbaum later gently clarified that she wouldn’t close the border, but that the call was “very kind” and had convinced her that no tariffs would happen.Martha Bárcena, a former Mexican ambassador to the US, said Trump’s tariff suggestion has kicked off “panic” in the Mexican community living in the US. “How can you hit your partners in a free trade agreement with tariffs 25% higher than what you put on the rest of the world? It’s crazy,” she said.“What was his ceiling is now his floor,” she said of his previous negotiating position on trade. “The lesson? Never yield to a bully.”Alejandro Celorio Alcántara, a Mexican diplomat who oversaw migration when Trump first came to power, says the bombast of the next US president can be easier to work with than more traditional allies.“The Biden administration is a little more diplomatic, but this can actually make the discussion more complicated, because you don’t know what the terms of negotiation are,” he said. “Maybe it’s just my style of negotiation. It’s simpler when it’s more open. They put the cards on the table: ‘This is what we want.’ Then you can respond.”Both Mexico and Canada have scores of diplomats already experienced with Trump, but both sides also expressed concern that many of the key figures in Trump’s first term, who acted as a “check” on the president’s whim-based policy decisions, will be absent from the second administration, replaced by loyalists and idealogues who will do whatever he says.Still, for Mexican officials, there is a glimmer of hope that those in positions of power are more reasonable when they’re not in the media spotlight. Alcántara noted that “border czar” Tom Homan, who recently pledged to carry out a “mass deportation’, is known for his controversial positions, “but if you take the facts to him and explain them, he understands. He has a certain discourse in the media that’s very aggressive, but when you sit down together, you can talk.”For Mexico and Canada, a recognition that their fates remain tied to the US has forced them to redouble their efforts, not to reconsider their relationship.“In the end, we need to bet on a strong North America,” said Alcántara. It’s simple: make North America great again. As a region, not just the United States.” More