After the meeting, in hastily announced remarks to reporters, Trump contemplated cutting off trade with G7 countries altogether if they didn't bend to his unreasonable demands, though he said his personal relationships with Angela Merkel, Macron, and Trudeau were all a "10". And swing he did on Twitter, responding to Macron's assertion that G7 nations would band together without the US.
Just after 6 a.m., Trump used the social media platform to accuse Canada of charging US customers astronomical tariffs on dairy products.
Other outstanding issues apparently remain, such as Chapter 19, which sets out dispute settlement panels for anti-dumping and countervailing duties that Canada and Mexico want kept in the deal but that the USA wants kept out. In the days leading up to the summit, he's fumed about his fellow G7 leaders, and in some cases they've bitten back.
The two-day summit in Canada has been marred by fears of a trade war and tit-for-tat exchanges of hostile tweets, with U.S. trading partners furious over Mr Trump's decision to impose tariffs on steel and aluminium imports from Canada, the European Union and Mexico as part of his "America First" agenda.
In recent weeks, he has imposed a number of punitive tariffs on the European Union and Canada, which only served to heighten the tension between the US and its allies that has been brewing since Trump announced he was withdrawing from the Iran nuclear deal and the Paris climate agreement.
Trump floated the idea - which was received as somewhat rhetorical - as the meeting was breaking up and was quickly challenged by Canadian Prime Minister Justin Trudeau, who asked, "What about subsidies?"More news: Verizon names former Ericsson chief as new CEO
"What worries me most is that the rules-based global order is being challenged", Donald Tusk, the chairman of European Union leaders, said at a news conference just prior to the start of the G-7 talks. We have to change it.
Macron said he and Trump held "open and direct" discussions, adding that he thought there was a way to get a "win-win" outcome on trade, though details remained unclear.
Should Trump disassociate with the group, reducing it to a G-6, it would leave the collective virtually inconsequential, according to some analysts.
He wants China to buy more agriculture and energy products from the United States.
Ben Sasse (R-NE), one of several Republicans to hit back at Trump's suggestion.
Trump appeared to have taken notice and pushed back: "Please tell Prime Minister Trudeau and President Macron that they are charging the USA massive tariffs and create non-monetary barriers", Trump said in a tweet. The United States pays enormous tariffs on dairy.More news: French Open final: Halep vs. Stephens predictions, start time and betting odds
"But, with that being said, Russian Federation should be in this meeting", he added.
British Prime Minister Theresa May on Friday warned both Trump and the European Union of the dangers of entering a tit-for-tat trade war over tariffs, urging both sides to instead focus on China's excess steel production.
"President Trump has placed himself on the wrong side: with the autocrats, the corrupt, and the anti-Americans, who look to Vladimir Putin as a natural ally", said Daniel Fried, a former career diplomat.
It is an annual summit bringing together Canada, the U.S., the UK, France, Italy, Japan and Germany, which represent more than 60% of global net worth between them.
"Russia is focused on other formats, apart from the G7", Kremlin spokesman Dmitry Peskov said in a statement reported by the government-controlled Sputnik news agency.More news: 3 takeaways from Game 3 vs. Warriors
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