The prime minister adds he is still working hard to gain a permanent exemption to these tariffs and has made it clear the USA argument of national security makes no sense.
While Trump did eventually live up to his word that he would exclude Canada, the Trudeau government has spent the a year ago lobbying US government officials for the exemption. Will that create a privileged access for us in the U.S. market?
Canadian steel facilities can't compete fairly against countries that choose "to sell at a loss in order to control the market", he said.
"(We're) highlighting that the imposition of tariffs on Canada would end up hurting the USA nearly as much as it would hurt Canada".
Later, at a roundtable with industry leaders, he spoke again of the importance of steel to Hamilton, saying he was there to listen.
Mr. Trudeau and members of his cabinet have insisted that the two issues are not linked and that extending the tariffs to steel and aluminum imported from Canada would harm the USA economy.
Brazil has said it will seek exemption from the newly imposed tariffs.
Trudeau also expressed optimism about reaching a good North American free-trade agreement that will benefit Canada as well as the USA and Mexico - despite Trump's constant refrain that the current deal is a bad one.
Asked whether he trusted the president, Trudeau said Trump has always kept his word to him and has been consistent in doing what he said he would do.
"Our aluminum is in their fighter jets our steel. goes into their armoured vehicles", he said. "We know that the collaboration on NORAD, the collaboration on national security issues narrow and broadly is something that is really important to both of our countries". So that whole issue of national security is off the table.
Trudeau's comments came during a tour of Canadian steel-producing towns, where he is showing support for workers in the industry.
Following Trudeau's visit to Hamilton, he will complete his tour with two more stops in Sault Ste.
"Ahead of actually applying border measures on offshore steel, there is a need for the Trudeau government to state its clear policy in dealing with steel diversion", Mr. Herman wrote in a memo to clients Monday. Marie, Ont., and Regina.
The president's decision last week exempted Canada and Mexico "at least at this time", and called on the North American Free Trade Agreement partners to "take action to prevent transshipment" of aluminum and steel. While the penalties take effect later this month, Trump has encouraged countries to try negotiating exemptions for themselves.