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%.

Here’s what South Korea’s three leading presidential candidates say about tariffs and the U.S.-South Korea relationship under President Trump.