He says the tariffs will protect U.S. steelmakers, which he says are vital to national security.
Finance ministers at this snow-capped mountain resort north of Vancouver, British Columbia instead spoke of exasperation and an abiding sense of betrayal by a long-time ally.
"Americans remain our partners, friends, and allies", Trudeau said. The ministers of the G7 countries also urged the US Treasury Secretary Steven Mnuchin to convey their "unanimous concern and disappointment" over the recent US decisions to impose tariffs on imports of metals from the European Union as well as from Canada and Mexico.
Trump, Trudeau, and several other world leaders are scheduled to meet next week in Canada at the G-7 meeting.
Canada has announced retaliatory tariffs that will kick in July 1, while the E.U.is challenging the tariffs at the World Trade Organization and is contemplating a tariff response.
Officials at the G7 meeting said the tariffs made it more hard for the group to work together to confront China's trade practices, especially when Beijing supports the current World Trade Organization-based trade rules and the U.S.is seeking to go around them. U.S. Commerce Department numbers show the U.S. recorded a trade surplus with Canada for each of the past three years.
Chinese universities ranked among global elite
Fudan University, University of Science and Technology of China and Shanghai Jiao Tong University all ranked in the 81-90 slot. The latest QS World University Rankings placed Tsinghua University and Peking University in 25th and 38th places respectively.
U.S. House Speaker Paul Ryan condemned the move saying it " targets America's allies when we should be working with them to address the unfair trading practices of countries like China".
Since Trump took office in 2017, Trudeau has attempted to work with his American counterpart to find an amicable agreement on the North American Free Trade Agreement despite Trump's harsh rhetoric. And it won't be on U.S. steel and aluminum - it will be on Harley Davidson motorcycles, California almonds, Levis and Jack Daniels. "But we need to respond".
In a CBC radio interview in Halifax, Trudeau slammed the widely denounced USA measures as "ridiculous" and ones that will backfire in the United States, which will face retaliatory dollar-for-dollar tariff "countermeasures" on up to $16.6 billion worth of American imports.
Morneau has called the steel and aluminum tariffs "absurd", because Canada is by no means a security risk to the U.S. He's warned the measures will destroy jobs on both sides of the border.
"We follow this with a lot of anxiety", Malmström said of the investigation. The tariffs, experts said, have become intertwined with efforts to renegotiate NAFTA.
"We think that the G7 (meetings) will be useful if at the end of the G7, the United States is aware of the possible negative consequences of their decision on the unity of the G7 not only the economic unity, but also the political one", Le Maire said.