President Donald Trump’s plan to impose a 25% tariff on all imported aluminum could cost 100,000 American jobs, the CEO of one of the largest US aluminum makers warned on Tuesday.

The new tariff rate, a 15 percentage point increase from prior levels that doesn’t permit any exceptions or exemptions, is set to go into effect next month. It’s part of Trump’s aggressive strategy to beef up domestic manufacturing — but risks sparking a global trade war.

More From CNN