The steel tariff investigation was launched to see the impact of steel imports on US national security.
In signing the order last week, the President made it clear that if Canada and Mexico made concessions during the NFTA negotiations, they would be exempted from the tariffs.
Canada is the biggest supplier of steel and aluminum to the United States but the steel sector accounted for only 22,000 direct jobs and represented 2 percent of exports previous year.
Trump and his trade officials have signalled in the past they are looking for more access to Canada's dairy market within a renegotiated NAFTA deal.
Trump has railed against major global trading partners, most recently by imposing a tariff on steel and aluminum exports, but granted an exemption to Canada and Mexico as the three countries approach a reorganization of NAFTA, the trade agreement Trump has threatened to tear up.
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Trudeau called his American counterpart during a tour of aluminum facilities in Quebec, on a day the prime minister did American television interviews to promote the integrated Canada-U.S. economy.
Days ago, Trump had kind of blackmailed Canada by saying the U.S. will exempt its neighbouring country from the latest trade tariffs only when a new NAFTA is signed.
European Union officials may challenge Trump's tariffs at the World Trade Organization, but that could be a long, drawn-out process.
He asked after their families and how they had been coping with the possibility of USA tariffs that he had repeatedly said would have a devastating impact in Canada. Mexico is also a member nation of the trade deal.
Chinese leaders, while denouncing the tariffs, have said a trade war with the U.S.is not good for either side.
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His Party of National Unity, which was the biggest political movement in the outgoing congress, finished fifth overall. The pro peace deal vote is now split among Gustavo Petro, Sergio Fajardo and Humberto de la Calle.
In seeking to win a respite from the tariffs, American allies tried a mix of persuasion, threats, personal appeals, and diplomatic leverage. So that whole issue of national security is off the table.
"We are ready to take action whenever action is required. we had your backs last week and we always will", Trudeau said after visiting a Rio Tinto Ltd (RIO.AX) (RIO.L) smelter in Alma, Quebec, his first stop on a tour this week of Canada's steel and aluminum regions.
The prime minister is on a cross-country tour of aluminum and steel factories to demonstrate his government's support for workers in light of potential threats to those industries from the US administration. Marie, Ont., and Regina, Sask.
Trudeau said Canada still had a lot more work to do and would press Washington to ensure the exemptions were permanent, and Canada has emphasized that tariffs would hurt both the United States and Canada. While the penalties take effect later this month, Trump has encouraged countries to try negotiating exemptions for themselves.
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