Trudeau had been saying the same thing for several weeks, but Trump apparently found it reprehensible to repeat the message on the eve of his historic summit with North Korean dictator Kim Jong-un.
Merkel said the G7 leaders had agreed to review their trade ties and assess the scope of existing tariffs in order to avoid further trade barriers.
The foreign affairs minister spoke to reporters in Ottawa and offered a markedly different tone from the attacks lobbed at Canada, one of the United States' closest allies, this weekend by President Trump and other members of his administration. Such a trade war would make products from other countries more expensive for US consumers and products from America more expensive in other countries. "The European Union had a $151 billion surplus - should pay much more for military!" Germany pays 1% (slowly) of GDP towards North Atlantic Treaty Organisation, while we pay 4% of a MUCH larger GDP.
The former Conservative prime minister said that while he believes the dispute is serious, that doesn't make it "lethal".
"We protect Europe (which is good) at great financial loss, and then get unfairly clobbered on trade".
Soon after Trump left the G7 summit he tweeted that he had instructed the House of Representatives not to endorse the final communique of the G7 summit due to Trudeau's "false statements at his news conference", as the Canadian prime minister dismissed U.S. metal tariffs as "insulting" and announced retaliatory measures. "Then Justin acts hurt when called out!" But the trolled Prime Minister had his staunch supporters too. USA officioals too, took on Mr Trudeau.
What did Trudeau and Trump say?
Prime Minister Theresa May has paid tribute to Canadian PM Justin Trudeau's leadership after a G7 summit which she described as "difficult". "And I left the meeting, and I'll be honest, we're being taken advantage of by virtually every one of those countries very seriously". Larry Kudlow, Trump's chief economic adviser, told CNN that Trudeau's press conference addressing Trump's actions was "a betrayal". We just shook hands.
"It's very unfair to our farmers, and it's very unfair to the people of our country", Trump said Tuesday in Singapore. "He should never have said it", Reagan said.
Foreign Affairs Minister Chrystia Freeland first announced "dollar-for-dollar tariffs" against the US on May 31.