Alcoa, the largest aluminum producer in the US, warned that a 25% tariff on aluminum imports from Canada would have a significant "damping effect" on US aluminum consumption. CEO William Oplinger stated that such high tariffs would negatively impact US consumers by US$1.5 to 2 billion. He noted that this tariff would suppress demand, affecting the stability and development of the entire aluminum industry chain.

Canada is one of the important sources of aluminum products for the US, and high tariffs would impact import costs and supply chain stability, increasing operating costs for US producers and potentially causing price fluctuations. Industry experts expressed concern about potential trade disputes and retaliation, negatively impacting the global economy and US aluminum competitiveness.