US President Donald Trump said on Saturday that he has asked US representatives not to endorse the joint statement put out by the Group of Seven leaders after Canadian Prime Minister Justin Trudeau's "false statements" at a news conference.
He wrote on his Twitter profile: "Please tell Prime Minister Trudeau and President Macron that they are charging the USA massive tariffs and create non-monetary barriers".
And the traditional "family photo" - featuring UK Prime Minister Theresa May, German Chancellor Angela Merkel, US President Donald Trump, Canadian Prime Minister Justin Trudeau, French President Emmanuel Macron, Japanese Prime Minister Shinzo Abe, and Italian Prime Minister Giuseppe Conte - offers a glimpse of the tension.
U.S. President Donald Trump said Nafta negotiators are "pretty close" to agreeing on some kind of sunset clause, a sticking point in talks, while warning the three-way pact can only survive if major changes are made.
Trump, who angered Washington's top allies last week when he imposed tariffs on steel and aluminum imports from Canada, the European Union and Mexico, issued a broad indictment of global trade, with swipes at the G7 and India. And let us not forget the American withdrawal from the Paris climate agreement a year ago.
Differences over trade tariff disputes and calls to re-admit Russian Federation have overshadowed a summit attended by leaders from from seven of the world's wealthiest nations in Canada.
Morneau said the tariff retaliation would cause "increasing friction" that would impede progress on NAFTA, but added there is a need "to step back from that destructive action so that we can actually get to the real work".
But Trump's gambit, which his economic adviser Larry Kudlow told reporters amounted to a "free trade proclamation", called the other leaders' bluff - if they're so opposed to his new tariffs, he suggested, why not eliminate all tariffs?
Although Trump said the tariffs are necessary to protect USA industry, Canada and the European Union have denounced them as illegal and are preparing retaliatory measures.
The six-plus-one tone of the gathering in Quebec means the leaders from Canada, Britain, the United States, France, Germany Italy and Japan are unlikely to issue a joint statement, too sharply divided on trade or the environment to reach consensus.
Speaking at a news conference, Mr Trudeau said: "I highlighted directly to the president that Canadians did not take it lightly, the United States' move forward with significant tariffs on our steel and aluminium industry.
And that ends", Trump said.
That leaves Trump diametrically opposed with Canada, which says renegotiating the deal every five years would create perpetual uncertainty and harm long-term investment. Trump left the summit early for Singapore, where he will meet North Korean leader Kim Jong Un next week. In addition to the US and Canada, the group includes Britain, Italy, France, Germany and Japan.
Macron came to Ottawa ahead of the G7 summit in part to talk strategy with Trudeau on how to deal with a mercurial president who likes to be liked.