In an interview Sunday on German public television, Merkel also says European leaders won't be "taken advantage of" on trade. But that didn't stop the Twitteratis from drawing inferences about the kind of "power dynamics" was at play at the Summit, where Trump seemed to not be in sync with the rest of the U.S. allies, as was perhaps evident by his decision to not endorse the joint statement.
Asked if she was concerned that Trump could retaliate against European Union counter-measures by imposing tariffs on cars, Merkel said: "First of all, we'll try and see if we can prevent this. The differences in opinion have not been taken off the table".
Trump called for Russia's reinstatement to the group before he arrived at the annual summit taking place in Quebec.
Throughout the summit, photographers captured photos of the tension between Trump and other world leaders.
"Canadians, we're polite, we're reasonable, but we also will not be pushed around", Trudeau said.
Trump was last to arrive for the G7 working breakfast, walking into the room when the summit's host, Canadian Prime Minister Justin Trudeau, had almost finished his welcome and presentation speech, Efe reported.
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President Donald Trump has tweeted that he now doesn't endorse the G-7 joint statement after what he calls Canadian Prime Minister Justin Trudeau's "false statements" at a closing news conference.
She said that even though such spending was unpopular with Germans, it was necessary, suggesting she would make a harder push to accelerate spending in the coming years.
Looking ahead to the next major diplomatic encounter with Trump - a meeting of North Atlantic Treaty Organisation alliance leaders in July - "it won't be easy", Merkel said.
The accusations largely confirmed the worst-case scenarios the government had for the G7 summit it was hosting in the picturesque Charlevoix region of Quebec where Trump was making his Canadian debut. Japanese Prime Minister Shinzo Abe, his arms crossed, appears to stare at French President Emmanuel Macron, who is barely visible in the photo but appears to be speaking.
Mr Trump's salvo capped a rollecoaster two days of controversies that began with his suggestion Russian Federation be readmitted to the G7, then what a French official described as a "rant" full of "recriminations" against USA trading partners, followed by a denial of any tensions with leaders at the summit and his description of their relationship as a "10".
With Trudeau, Trump joked that "Justin has agreed to cut all tariffs and all trade barriers between Canada and the United States".