Trump's announcement on Twitter, after he left the G7 summit in Canada early, that he was backing out of the joint communique torpedoed what appeared to be a fragile consensus on a trade dispute between Washington and its top allies.
Shortly after President Trump blasted Canada on Saturday and said the USA would not endorse a joint statement with other world leaders at the Group of Seven summit in Quebec, the almost 4,000 word communique was released.
He was reacting to Trudeau's declaration that Canadians would "not be pushed around" and would hit back at punishing U.S. tariffs on metal imports with "equivalent tariffs".
Meanwhile, President Trump said Saturday that renegotiations on NAFTA could lead to a new trilateral trade deal with substantial changes or two separate trade agreements.
American tariffs are in response to Canada's tariffs of "270% on diary" delivered by the United States, he said.
The G7 summit came amid rising tensions between the USA and other member nations - Canada, Britain, France, Germany, Italy, and Japan - over Trump's recent steel and aluminum tariffs.
"International cooperation can't depend on anger and small words".
We are focused on everything we accomplished here at the #G7 summit.
Mr Trump had earlier denied that the summit had been contentious, contradicting what one G7 official described as a bitter harangue between the US President and his counterparts over tariffs.
One Magnificent Photo Sums Up Donald Trump's G-7 Visit
With as neutral an expression as possible, she stares directly at President Trump, who sits on the other side of the table. Merkel will meet new Italian Premier Giuseppe Conte for the first time at this week's Group of Seven summit in Canada.
U.S. President Donald Trump railed against trade practices he called unfair to the United States at the meeting, where leaders agreed on Saturday to fight protectionism and reform the World Trade Organization.
"Trump did not want to be isolated", Macron said. The president had described the G7 meeting as cordial, even though he accused the US allies of treating America "like a piggy bank".
Tusk predicted that the summit would be the most hard in years and lamented that the "rules-based global order is being challenged" by current US President Donald Trump, Efe reported.
Former FBI Director James Comey also weighed in, tweeting Saturday night on the US-Canadian relationship.
Still, Trudeau also gave an account of his discussions with the USA president.
Trump has infuriated the European Union, Canada and Mexico by imposing tariffs on steel and aluminum imports.
Mr Trump has long said the North American Free Trade Agreement has been a "disaster" for the USA and has insisted that it be renegotiated. "We are open to dialogue, but that does not mean transforming a defined process, linked to the implementation of the Minsk accords", he said.
"Very dishonest & weak", Trump continued.
The G7 joint communique, which advocates a "rules-based trading system", was reached despite tension over U.S. tariffs on steel and aluminium imports, reported BBC.
Trudeau also took a jab at President Trump, who arrived late for a gender equality meeting.