Asked about the scathing comments from Trump's advisers on Sunday, Canadian Foreign Minister Chrystia Freeland called Trump's tariffs on Canadian aluminum and steel "illegal and unjustified" and said Canada does not believe in using "ad hominem attacks" on the global stage.
The United States on Saturday signed a G-7 declaration calling for a reduction of tariffs and other barriers to trade, though President Donald Trump continued to lash out at traditionally close allies for allegedly treating unfairly on trade.
The summit in Canada was marked by the United States president's controversial trade policy which has put him at odds with the rest of the G7 leaders.
Trudeau said Saturday during a news conference that Canada will "move forward with retaliatory measures" on July 1 in response to the Trump administration's decision to impose tariffs on steel and aluminum imports from Canada, the European Union and Mexico.
But then, he used his full name.
Earlier reports had indicated that the United States had endorsed the communique, but Trump subsequently posted a message on Twitter slamming Canadian Prime Minister Justin Trudeau's press conference held after the summit.
"He can take that nation and truly make it a great nation so it is a one-time shot and I think it is going to work out very well", Mr. Trump said. "We're not looking to play games", Trump added.
On May 31, the USA had announced the imposition of 25 and 10 percent tariffs on steel and aluminum respectively on three of its biggest trading partners - Canada, Mexico and the European Union (EU).More news: First bond girl Eunice Gayson dies: 007 babe found dead
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"We are convinced that a modernization is perfectly possible, we are convinced that common sense will triumph", she said.
US President Donald Trump said on Saturday he told Group of Seven leaders that the United States required fair access to markets and an end to unfair trade practices. The president says at the Group of Seven summit: "If they retaliate, they're making a mistake".
While talking tough with USA allies such as Canada and the EU, Trump repeated his call for Russian Federation to be allowed back into the elite club, which includes Britain, Canada, France, Germany, Italy, the US and Japan.
Despite the tension and determination of European leaders President Emmanuel Macron of France and Chancellor Angela Merkel of Germany to push back on Trump's assault on the world trade system, when Trump left it was thought a compromise had been reached.
President Donald Trump arrived late for a gender equality meeting at an worldwide summit, prompting Canadian Prime Minister Justin Trudeau to kick it off without waiting for "stragglers" to arrive. "We managed to convince Trump that six plus one was feasible and he did not want that". "Many of the current discussions about trade, especially with the US, despite the common commitment, will continue".
The summit ends later today, but Trump is set to leave early, missing the discussion on climate change and protecting oceans.
He says he spoke with world leaders about his trade policies and called for the elimination of tariffs, trade barriers or subsidies. He reiterated his longstanding view that the USA has been taken advantage of in global trade, adding, "We're like the piggy bank that everybody's robbing, and that ends".
During the summit, other security threats were addressed including the threat of Iran.