U.S. President Donald Trump is intensifying his push on tariffs following a recent federal court ruling, raising pressure on Korea’s incoming administration ahead of soon-to-begin full-scale trade negotiations with Washington.

By Hyunjoo Jin and Hongmei Li SEOUL/SINGAPORE (Reuters) -Shares in South Korean and Vietnamese steelmakers, major Asian exporters of the metal to the United States, dropped on Monday after U.S. President Donald Trump said he would double tariffs on imported steel and aluminium to 50%.

Futures tracking aluminum and steel prices in the US surged after President Donald Trump said he will double tariffs on the metals this week.

The president's plan - where countries face between 11% to more than 100% tariffs on goods brought into the US - was announced in April. But the majority of the tariffs were paused by Trump for 90 days in the wake of stock market volatility.

President Donald Trump forecasted the death of the U.S. economy if America were prevented from deploying counter tariffs against other countries. A court battle is underway regarding Trump’s “Liberation Day” tariffs after the U.