"We know from experience that we need to wait and see what this president is actually going to do", Trudeau said during a news conference just before the Sanders briefing.
It should not come as much of a surprise that Trump would raise tariffs.
Trump hopes the imposition of tariffs will help him to bring back jobs to the United States which he alleged to have been stolen by other countries that acted unfairly.
Philip Levy, a former trade adviser in President George W. Bush's administration, said the flaw in Trump basing his tariffs on national security was that military allies could ask to be excluded, undermining the president's stated objective of protecting domestic steel and aluminum mill jobs. The probe was authorized under the seldom-used Section 232 of the 1962 Trade Expansion Act, which gives the president broad powers to impose restrictions on domestic security grounds.
Two polls released this week say the tariffs are unpopular. "Not any longer. The workers who poured their souls into building this great nation were betrayed, but that betrayal is now over".
Has the United States - which has generally been a champion of free trade since World War II - been the victim of unfair trading practices by other nations? The group also warned that retaliatory tariffs from other countries could drive up the price of other US goods, as well.More news: GOP lawmakers criticize Murphy's tax hike plan
Several lawyers were skeptical that a court would block the president. Trump's tariff wall would only hurt the US's close allies and neighbours - Canada, Mexico, EU and South Korea. He said only that the reprieve remains in place for now and that NAFTA is important to economic and national security. As such, the company has been following this issue carefully - and making our voice heard through direct appeals to elected officials - since the U.S. Commerce Department began investigating potential steel and aluminum tariffs a year ago. It will probably be challenged in the WTO, as it should, because what's to stop others from parroting this nonsense to justify their own tariffs? But it may be hard to get a veto-proof majority with some Democrats supporting Trump's action. "I've got to applaud President Trump".
But Trump has shown he wants more.
"Trade wars are not won, they are only lost", Flake said in a statement shortly after the president signed the tariff proclamations. "Congress can not be complicit as the administration courts economic disaster".
Both Senate Finance Committee Chairman Orrin Hatch of Utah and Senate Homeland Security and Governmental Affairs Committee Chairman Ron Johnson of Wisconsin are planning hearings in coming weeks about the decision.
Ross Denton, a partner at law firm Baker McKenzie, said the European Union may try to convince the administration to selectively drop tariffs on its most popular steel products. Johnson's seeking "detailed" response from the administration by March 22.
But where does that leave the rationale of national security, Levy quite rightly asks? This spurred Trump to warn that the USA would respond by imposing a retaliatory tax on auto imports from Europe and to tweet that "trade wars are good, and easy to win".
Despite widespread condemnation from House Republicans, none have introduced measures to counter Trump's action.
Only last month Trump went to Davos accompanied by Cohn, to reassure the business world that his "America First" policy did not mean America alone.
After a week of intense lobbying from members of Congress - including members of Mr Trump's own party - world leaders and other stakeholders, he has agreed to exempt Canada and Mexico from the tariffs.