Prime Minister Justin Trudeau accused China of flooding global markets with cheap steel Monday, saying Canada has already taken steps to prevent "dumping".
"We are very concerned about the actions taken by China and the dumping of steel and aluminum on the global market", Trudeau said following a tour of a steel and aluminum plant.
It was their first conversation since Trump last week imposed tariffs on imported steel and aluminum, raising trade tensions.
When Trump announced last week 10 percent tariffs on aluminum and 25 percent on steel, he said Canada and Mexico could be exempted permanently if the ongoing renegotiation of the North American Free Trade Agreement (NAFTA) is successful.
"The exemptions aren't a magical favour that was being done (for Canada)", Trudeau said.
"We will always stand up for Canadian steel and aluminum workers".
Mr. Trump has threatened to expand the steel and aluminum duties to the two countries if there is no progress on meeting USA demands in the negotiations on the North American free-trade agreement.
Canada, the biggest supplier of steel and aluminum to the United States, escaped Trump's import duties along with Mexico, but the two countries could still face duties if they fail to reach a deal with the Trump administration on modernizing the North American Free Trade Agreement.
She is to meet US Trade Representative Robert Lighthizer, Commerce Secretary Wilbur Ross, Congressional leaders and others. "That is because the level of integration within our two markets is deep, complex and profitable to both of our countries".
Canada is the United States' largest foreign provider of steel and aluminum, with about 85 per cent of Canadian exports being directed to that country.
Mr. Trudeau also took Canada's case to US cable channels on Monday with appearances on MSNBC and CNN. He's also set to visit Sault Ste. Marie, Ont., and Regina.
Executives in the steel-processing sector describe the manner in which countries and importers get around tariffs as being akin to a sheet of paper. This comment was made after he was asked about Gerald Stanley's acquittal.
Canada's Prime Minister Justin Trudeau receives the 2018 Catalyst for Change Award and delivers remarks at the Equal Voice International Women's Day Lunch in Toronto, Ontario, Canada, March 8, 2018.
The Prime Minister told aluminum plant workers in Saguenay, Quebec, he will always have their backs when it comes to fighting USA tariffs.