Mr Trump roiled the G7 meeting in Canada by first agreeing to a group statement on trade, only to withdraw from it while complaining that he had been blindsided by Canadian Prime Minister Justin Trudeau's criticism of his tariff threats at a summit-ending news conference.
Merkel's comments came amid the escalating fallout from a contentious meeting between Trump and other world leaders at the recently concluded Group of Seven (G7) Summit in Canada.
Before his departure from Canada the previous day, he tweeted: "Based on Justin's false statements at his news conference, and the fact that Canada is charging massive Tariffs to our US farmers, workers and companies, I have instructed our US Reps not to endorse the Communique as we look at Tariffs on automobiles flooding the US Market!"
In a statement, French President Emmanuel Macron's office said all of Europe, which includes four of the G-7 nations, are standing in solidarity behind the communique agreed upon during last week's G-7 summit in Canada.
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At the G-7 summit, Trump's spokeswoman, Sarah Huckabee Sanders, said the US was "close to a deal" on NAFTA.
Heading into the leaders' summit in La Malbaie, Que., there were deep concerns the G7 alliance was fast becoming a G6 plus one because of a widening gulf between the USA and the rest of the group in key areas such as climate and trade.
She said: "We won't let ourselves be ripped off again and again".
"The European Union will continue to stand up for an global, rules-based, multilateral system", Schinas said. Lindsey Graham, R-S.C., also called Trudeau's comments a stab in the back to Trump. "That's what weak, dishonest Justin Trudeau did, and that comes right from Air Force One", said Navarro.
Trump has repeatedly raked up the issue of India imposing high import duty on the iconic Harley-Davidson motorcycles and threatened to increase the import tariff on "thousands and thousands" of Indian motorcycles to the US.
"Sorry, we can not let our friends, or enemies, take advantage of us on trade anymore". We will also definitely go into talks with our. partners, especially Canada and Japan, and again see how we could work closer together.