He wrote on Twitter on Sunday that the agreement at Charlevoix would, among other things, strengthen “our economies,” and protect women and the environment. “That’s what matters.”
Canadian fury at Trump notwithstanding, analysts said it was difficult to overstate the damage that bad relations with him could cause to the Canadian economy. Canada relies on the United States as its only neighbor, its military ally and its largest trading partner.
About 1.9 million Canadian jobs are tied directly to trade with the United States, which absorbs almost three quarters of Canada’s exports.
“Any Canadian prime minister, no matter what the American president does or says, has to deal with the president of the United States,” said Janice Stein, founding director of the University of Toronto’s Munk School of Global Affairs.
Nevertheless, some analysts said Mr. Trump’s attack could work to politically embolden Mr. Trudeau, a Liberal, whose popularity has been waning here after a series of missteps and the rise of populism, including Mr. Ford’s recent election as the premier of Ontario.
John J. Kirton, director of the G-7 Research Group at the University of Toronto, a network of people who study the gatherings, said Mr. Trudeau, who faces an election next year, needed to appeal to rural voters in Ontario and Quebec and show that he was protecting Canada’s heartland in the face of Mr. Trump’s protectionism.
“Every Canadian prime minister has to be seen to protect the dairy sector,” Mr. Kirton said. Mr. Trump has repeatedly attacked Canada’s tariffs on dairy imports.
Mr. Trudeau has been philosophical about the limits of Canada’s ability to placate Mr. Trump.
“If the expectation was that a weekend in beautiful Charlevoix surrounded by all sorts of lovely people was going to transform the president’s outlook on trade and the world,” he said in his final news conference at the summit before the tweet storm, “then we didn’t quite perhaps meet that bar.”