Overview

• The tariffs took effect June 4 under a national security proclamation that raises levies from 25% to 50% on imported steel and aluminum.
• Canada’s government condemned the increase as illegal and unjustified given its reliance on the U.S. for 94% of its aluminum and 91% of its steel exports.
• Economists warn the measure could choke cross-border projects and jeopardize tens of thousands of jobs across North American supply chains.
• Ottawa has signaled reciprocal duties against U.S. goods and is negotiating with Washington to restore market access for Canadian producers.
• U.S. manufacturers and consumers, including small metalworkers in states like Massachusetts, are bracing for higher costs that may undercut President Trump’s promise of lower prices.