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.

Trump’s plan to expand aluminum tariffs spells higher costs for can and component makers, but aluminum producers say imports have held down prices.

Aluminum producer Alcoa said on Tuesday that U.S. President Donald Trump's plan to impose a tariff on aluminum imports could cost about 100,000 U.S. jobs and would itself not be enough to entice it to boost production in the country.