Trump is no fan of the world's multilateral institutions, and that has set him on a collision course with his fellow G7 leaders, creating the so-called G6-plus-one dynamic. "This is probably not because he does not understand, but because of domestic reasons".
President Donald Trump on Friday kept up his attacks on US allies ahead of his trip to the Group of Seven summit in remote Quebec. "We'll see how it all works out".
Mr Macron was speaking alongside Canadian prime minister Justin Trudeau, who is hosting the summit, and the pair signalled they would warn Mr Trump of the potential damage tariffs could cause the US. "And Emmanuel's been very helpful in that regard".
Trump, of course, responded in kind.
Although Trump said the tariffs are necessary to protect US industry, Canada and the European Union have denounced them as illegal and are preparing retaliatory measures.
Trump has attacked both France and Canada on Twitter leading up to the summit. Foreign Affairs Minister Chrystia Freeland insisted that the first working meeting of the leaders was "cordial" and "productive", although she was talking about a session that dealt with each country's own domestic policies, not contentious global issues.
Canada and the European Union rejected the notion immediately, while only Italy was open to the idea.
G-7 members are likely to take the opportunity in Quebec to address economic concerns with President Trump, as numerous countries are impacted by recent trade policy decisions the administration has made.
Trump will then head to Singapore ahead of his highly-anticipated meeting with North Korean leader Kim Jong Un on Tuesday. "Because these 6 countries represent values, they represent an economic market which has the weight of history behind it and which is now a true worldwide force", French President Emmanuel Macron Tweeted Thursday.
As he prepared to travel to Canada, he ramped up his blast of Canada on Twitter this morning over what he says are unfair trade practices.
In Germany, top officials called for Europe to remain unified in the face of rising trade tensions with the United States even as they maintained that America remained its closest partner outside the continent.
But this year's talk of tackling climate change will be a reminder of the divisions that have widened in the G7 family. "So, without the United States the G-7 really isn't anything", according to Sebastian Mallaby, a CFR senior fellow for worldwide economics.
"We should at least consider no tariffs, no barriers - scrapping all of it", Trump said, according to officials who were listening and taking notes.
"With that being said, Russian Federation should be in this meeting".
But other G-7 leaders said it was not going to happen at this time. "We focus on other formats", TASS quoted Putin's spokesman Dmitry Peskov as saying.
Over his objections, USA lawmakers overwhelmingly passed a sweeping sanctions bill previous year that imposed tough new punishments on Moscow for its actions in Ukraine, Syria, and other matters.