Later on Saturday, after Canadian Prime Minister Justin Trudeau said all seven nations had signed a joint communique at the end of the summit, Trump angrily lashed out on Twitter, stating the USA would not endorse the statement.
Anticipating a tense two days in Quebec, Trump has complained about having to attend the summit, particularly since it comes just before his high-stakes meeting in Singapore with North Korean leader Kim Jong Un, said two people with knowledge of his thinking.
German Chancellor Angela Merkel said Sunday (10 June) she was more open to French President Emmanuel Macron's plans to reform migration and defence policy in Europe than his hopes to bolster the euro.
President Trump has refused to budge on his tariffs against Canada and European countries.
Investors are also concerned about the future of the North American Free Trade Agreement, which Trump has threatened to terminate.
The leaders had been meeting at the Group of Seven summit in Quebec, Canada over the weekend.
"Whether you like it or not - and it may not be politically correct - but we have a world to run, and in the G-7, which used to be the G-8, they threw Russian Federation out", he said.
In spite of engaging in a recent war of words with Trudeau over tariffs, Kudlow said the two countries remain "firm friends" in spite of short-term disagreements and that the planned bilateral meeting will be a strong opportunity for the two leaders to work out their differences.
The G7 is made up of Canada, France, the United States, the United Kingdom, Germany, Japan and Italy.
By the time Trump did arrive in Canada, met by a cordon of red-jacketed Mounties, he was well behind schedule, making the meeting impossible.
European leaders criticize the USA decision to impose protectionist tariffs on steel and aluminum and to exit the Iran nuclear deal and the Paris climate agreement. Speaking on the condition of anonymity a Canadian official told national broadcaster CBC that not only had Trudeau made these remarks prior to the meeting, on USA television last week, he had also informed Trump of his position before he went on air.
One viral photo is telling it all about tensions at the G-7 summit.
"The other countries of the G6 are a larger market than the American market", Mr Macron said. "The President made it clear today".
The chancellor also addressed concerns that Trump would hit back by implementing tariffs on German vehicles, saying, "First of all, we'll try and see if we can prevent this".
But Wright added: "There is a feeling, I think, over the last few months, that that approach has not borne fruit, and that they haven't really gotten anything for that friendly approach".
Trump showed no sign of backing down on Friday after accusing both France and Canada of imposing massive tariffs on U.S. goods, and then lashing out at Trudeau for "being so indignant".