Existing American tariffs already restrict steel and aluminum shipments from China, which is now flooding other markets with its exports instead.

President Donald Trump says he will also impose "reciprocal tariffs" on any countries who place tariffs on the US.

President Donald Trump plans to on Monday formally announce 25% tariffs on steel and aluminum imports as part of an aggressive effort to remake the existing terms of world trade that so far has compounded economic uncertainty.

The 25 percent tariff the president is proposing is almost identical to a move in his first term. Economists and foreign governments know what will come next.

Steel and aluminum are heavily used in the automotive and construction industry, but are also used to manufacture goods and appliances. The decision mirrors the actions Trump levied during his first Administration, when he enacted a 25% tariff on steel and 10% tariff on aluminum, though some countries, including South Korea were exempt.

President Donald Trump, speaking to reporters on Air Force One Sunday, said he planned on announcing a 25% tariff on all steel and aluminum imports into the United States.

The top three suppliers of steel to the US are Canada, Brazil, and Mexico. China is the 10th largest supplier of steel to the country.