As tweeted by Trump: "based on Justin Trudeau's false statements at his news conference and the fact that Canada is charging massive Tariffs to the United States farmers, workers and companies", the U.S. president has instructed representatives, officials and lawmakers in the USA not to endorse the final G7 communique.
It ended worse, with Trump and Canada Prime Minister Justin Trudeau threatening a trade war, and Trump revoking the USA approval of the summit's final joint statement. 'The Prime Minister said nothing he hasn't said before - both in public, and in private conversations with the President'.
"There is a special place in hell for any for leader that engages in bad faith diplomacy with President Donald J. Trump and then tries to stab him in the back on the way out the door and that's what bad-faith Justin Trudeau did with that stunt press conference, that's what weak, dishonest Justin Trudeau did", Navarro said on "Fox News Sunday".
Trump said he pushed for the elimination of trade barriers, including subsidies and tariffs, at the G-7 meeting.
Hours after indicating he would sign on to a carefully drafted G7 communique, he rescinded his support, accused Prime Minister Justin Trudeau of being meek and dishonest, and threatened Canada with more trade action.
American tariffs are in response to Canada's tariffs of "270% on diary" delivered by the U.S., he said. Trump fired back, saying the USA had been duped for for years by barriers and that any country that imposed its own measures would regret it.
"If they retaliate, they're making a mistake", he said.
"And so began a long litany of recriminations, somewhat bitter reports that the United States was treated unfairly, that the trading system was totally unfavourable to the United States, the American economy, American workers, the middle class".
Putin heads to Beijing for state visit with birthday buddy Xi Jinping
He said that the Chinese President was the only state leader "who celebrated his birthday with him", sharing vodka and sausage. Russian Federation was expelled from what was then called the G8 in 2014 because of its annexation of Crimea from Ukraine.
And he departed the gathering early - skipping a discussion of global climate change - to fly to Singapore for a nuclear summit with North Korean leader Kim Jong Un.
"Our Tariffs are in response to his of 270% on dairy!" the USA president tweeted.
In case ya missed it, the leaders of Germany, Canada, Japan, United States, France, Italy, and the United Kingdom have come together to talk global issues.
Trump did not specify which of Trudeau's statements he considered false.
The Trump administration announced two weeks ago that it would investigate whether auto imports hurt USA national security, the first step toward tariffs similar to the ones he imposed on steel and aluminum imports last week. "I have made it clear to the president that [imposing retaliatory tariffs] is not something we relish doing, but it's something we absolutely will do".
While the consensus-based G7 might well agree on the benefits of both free and fair trade between economic allies, it appears what that could look like it still up for debate.
Canada and the European Union have denounced the USA tariffs as illegal and unjustified and Ottawa has proposed levies on a range of US goods next month while the European Union has pledged its own retaliatory measures.
But the president batted away rumors the summit had been rife with tensions between the US and other nations, The Hill reported. On Friday, Mr Trump made a surprise call for Moscow to be readmitted, but German Chancellor Angela Merkel said other members were against the idea. Trump has also maintained his stance that tariffs are a national security issue, because unfair trade deals "affect our military", he said.