US President Donald Trump and Canadian Prime Minister Mark Carney faced off in the Oval Office on Tuesday and showed no signs of retreating from their gaping differences in an ongoing trade war that has shattered decades of trust between the two countries. The two kept it civil, but as for Trump´s calls to make Canada the 51st state, Carney insisted his nation was “not for sale” and Trump shot back, “time will tell.” Asked by a reporter if there was anything Carney could tell him to lift his tariffs of as much as 25% on Canada, Trump bluntly said: “No.” The US president added for emphasis, “Just the way it is.” Carney acknowledged that no bit of rhetoric on tariffs would be enough to sway Trump, saying that “this is a bigger discussion.” “There are much bigger forces involved,” the Canadian leader continued. “And this will take some time and some discussions. And that’s why we’re here, to have those discussions.” The meeting between the two leaders showcased the full spectrum of Trump’s unique mix of aggression, hospitality and stubbornness. Shortly before Carney’s arrival, Trump insulted Canada by posting on social media that the United States didn’t need “ANYTHING” from its northern neighbor, only to then turn on the charm and praise Carney’s election win in person before showing his obstinance on matters of policy substance. Carney won the job of prime minister by promising to confront the increased aggression shown by Trump, even as he has preserved the calm demeanor of an economist who has led the central banks of both Canada and the United Kingdom. At times, Carney struggled to interject his views and raised his hand to talk as Trump held forth at length and veered between topics, touching on California Democratic Gov. Gavin Newsom, Carney´s predecessor, Justin Trudeau, and teasing a “great” upcoming announcement that’s “not necessarily on trade.” Trump offended Canada’s sense of pride and friendship by saying he wants to make Canada the 51st US state and levying steep tariffs against an essential partner in the manufacturing of autos and the supply of oil, electricity and other goods. The outrage provoked by Trump enabled Carney´s Liberal Party to score a stunning comeback victory last month as the trade war and attacks on Canadian sovereignty have outraged voters. Trump said the two would not discuss making Canada part of the US, even as he insisted the idea would lead to lower taxes for Canadians.