Trudeau expects 'difficult' conversations with Trump at G7

WATCH Opposition Leader asks Prime Minister why there’s delay in Canadian tariffs taking effect

Every other G7 country plans on launching retaliatory tariffs against U.S. goods.

"I'm always the optimist, I believe it can be worked out", Kudlow said.

The lessons Merkel learned from that meeting with Trump will colour her approach to him this week, said Josef Janning, a Berlin-based senior policy fellow at the European Council on Foreign Relations.

"It's worrying. It's the work for young people today".

"President Trump is very clear with respect to his trade reform efforts that we will do what is necessary to protect the United States, its businesses, and its workforce", he said.

Before departing for Canada, Mr Trump tweeted: "Please tell Prime Minister Trudeau and President Macron that they are charging the U.S. massive tariffs and create a non-monetary barriers".

"These are good, well-paying jobs - so, for sure, it keeps the whole economy rolling", Belanger said of the local aluminum industry.

Canada and Mexico already have retaliated against a range of US exports and the European Union has promised to do so as well, raising the specter of a tit-for-tat escalation. "This is the game".

The tariffs, which Trump's administration announced on May 31, impose a 25 percent tax on imported steel and a 10 percent tax on imported aluminum.

Malika Cherry is director of a business organization that represents regional aluminum firms, except for the big, primary producers. "I think we've done everything we can and put everything on the line", he said.

Kudlow said allies should understand that Trump "will do what is necessary to protect the USA, its businesses and its workforce", adding that Trump "has always said, and I agree, tariffs are a tool in that effort". "It will start first of all to hurt USA workers".

Trump withdrew from the Joint Comprehensive Plan of Action initially signed between Iran and a group that included China, Russia, France, Germany, the U.K. and the United States.

The two leaders also dismissed as absurd Trump's assertion of national security concerns. "The impact on Canada and ultimately on workers in the USA won't be a laughing matter". She and Macron recently made separate trips to Washington in failed bids to persuade the USA president not to abandon the Iran nuclear agreement. We can only imagine that the president's phone has been ringing off the hook as world leaders try to get from POTUS himself just what is going on here.

"If that's not an example of national security collaboration, I don't know what is".

That was actually British troops, and historians say it was payback for an American attack on York, Ontario, which later became a part of Canada.

Trudeau chuckled at the question, characterizing the president's "little comment" as a joke.

"The idea that we are somehow a national security threat to the United States is, quite frankly, insulting and unacceptable", Trudeau told NBC's Meet the Press.

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