The president also tweeted from aboard Air Force One that due to "Justin's false statements" the us would not sign on with the other six members of the G-7 to a joint communique that was to follow the meeting. Canada does indeed impose a 270% tariff on dairy that has kept many US dairy products from making their way from the U.S.to Canada.
The acrimonious fallout from the G7 began after Mr Trump watched Mr Trudeau's end-of-summit press conference.
In Quebec at the G7 the sherpas, political advisers and draftsmen toiled through two nights to find a form of words that all sides could sign up to.
That's the tantalizing context for this now iconic photo at this past weekend's G-7 summit in Canada, shared by several people in the room, including National Security Advisor John Bolton. "I was talking about disillusionment, which is a lot for me already". But lo, by the time I landed in Hong Kong to change flights I read that there was a joint communique.
Spokesman Cameron Ahmad said on Saturday night that Mr Trudeau "said nothing he hasn't said before - both in public and in private conversations" with Mr Trump.
Trump's actions deepened the divide between the United States and its allies, and European leaders Sunday expressed shock and resignation at this latest sign that the president is eager to defy diplomatic norms and blow up trade relationships that have been strong for decades.
Although U.S. senators have warned that a spat risks launching a "trade war", the key factor behind Trump's apparent policy zigzag was a matter of his image ahead of a first ever meeting with North Korean leader Kim Jong Un this week, according to Trump's economic adviser Larry Kudlow. And add to that the fact that the USA pays close to the entire cost of NATO-protecting many of these same countries that rip us off on Trade (they pay only a fraction of the cost-and laugh!).
How did the spat unfold?
With only hours remaining before a historic summit between the leaders of the United States and North Korea, it's easy to lose sight of what President Donald Trump (and some of his top staffers) said and did just before arriving in Singapore: Blow up an global gathering with some of America's closest allies with a combination of erratic behavior and hugely impolitic statements.
Trump was reacting to Canadian Prime Minister Justin Trudeau, who said Saturday that Canada would retaliate for Trump's proposed new tariffs.
Trudeau said at the news conference that while the G-7 meeting was "very successful", Canada could impose retaliatory tariffs on US products. 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.
Trump has drawn criticism in recent days for suggesting that Russian Federation rejoin the G-7. Sen.
In his tweets following the G-7 summit, Trump also indicated that he may soon target foreign cars produced for the USA market. Or we'll stop trading with them.
"POTUS is not going to let a Canadian prime minister push him around on the eve of this", Kudlow said, using an acronym for president of the United States. "We strive to reduce tariff barriers, non-tariff barriers and subsidies", it said.
"We have done just that at this summit, registering our deep disappointment at the unjustified decision by the United States to apply tariffs to European Union steel and aluminium imports".
Then we have these four angles. The U.K., German and French governments have said they stand by the commitments made at the meeting.