Hours after leaving the G7 summit on Saturday, Trump took to Twitter to assault the Canadian Prime Minister Justin Trudeau's "false statements" and instructed United States representatives to renege on the US' endorsement of the joint communique.
The G7 meeting collapsed in farce as Trump left early to meet North Korean leader Kim Jong-un for a summit in Singapore, refusing to sign a communique produced by the group.
Ahead of the meeting, Trump already set a hostile tone on his Twitter profile, lashing out against Canadian Prime Minister Justin Trudeau over fees on dairy products, calling him indignant, in addition to criticising unfair tariff barriers.
"I have made it very clear to the president that it is not something we relish doing, but it is something that we absolutely will do because Canadians, we're polite, we're reasonable, but we also will not be pushed around", Trudeau said.
"Reneging in a tweet is sobering and a bit depressing", Merkel said in the interview with broadcaster ARD late Sunday.
That wrestling cry would have been an apt announcement at the G-7 summit, what with the U.S. and other heads of state at each other's throats using the thrust and parry of rude remarks and social media to pummel each other.
The French president's office said in a statement: "International co-operation can not be dictated by fits of anger and throwaway remarks".
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But when Trudeau said Canada would be forced to retaliate for USA tariffs on steel and aluminum and would not agree to a sunset provision in a new North American Free Trade Agreement, "he really kind of stabbed us in the back", Kudlow said.
The U.S. president arrived several minutes after the start of the breakfast meeting between G7 leaders and the gender equality advisory council that Prime Minister Justin Trudeau created for this year's summit in the Charlevoix region of Quebec.
Trump criticizing the Group of Seven nations host and stepped back from the generally positive tone that had ended the two-day meeting in Quebec. "He was the one who let Crimea get away - that was during his administration", he said, adding: "Obama can say all he wants, but he allowed Russian Federation to take Crimea".
"President Trump is targeting the dairy sector because he wants to dump USA dairy into Canada", Lampron told The Canadian Press, adding that Canada imports five times more dairy from the US than it exports.
Trump negotiated in good faith on the communique agreed by the other members of the G7, only to have Trudeau criticize US policy after he left, Kudlow said.
When a CNN reporter asked Trump to respond to a question about whether he had sowed division in the G7 in what many have described as a G6-plus-one scenario, the president excoriated the reporter for perpetuating "fake news".
"If they retaliate, they're making a mistake", Trump said. He says "we're not looking to play games".