A U.S. tariff on Canadian imports would undermine America's industrial competitiveness by increasing the cost of aluminum by $1.5 billion to $2 billion a year, Alcoa's chief executive said.

In slapping duties on steel and aluminum nearly seven years ago, Trump reached into the federal government’s tariff toolkit ...

Alcoa Corporation President and Chief Executive Officer William F. Oplinger will participate in a live webcast session at the ...