Alcoa (NYSE:AA) has paused work on all its growth projects in Canada due to President Trump's tariffs, and may need to turn to the Canadian government for help if the leveis remain in place, CEO Bill Oplinger told Bloomberg in an interview Friday.

US President Donald Trump has announced that all imports from Canada will have a 35% tariff as of August 1. He sent a letter to the country’s president, Mark Carney, informing him of the new rate, which has also been posted on his Truth Social account.

Trump threatened to escalate tariffs beyond 35% if Canada opts to retaliate with tariffs on U.S. goods. Canadian goods are also subject to sector-specific tariffs, such as 50% levies on steel and aluminum as well as 25% tariffs on non-USMCA compliant autos and auto parts.