By Steve Holland, David Shepardson and Heekyong Yang WASHINGTON/SEOUL (Reuters) - South Korea's Hyundai Motor Group announced a $21 billion investment in the United States with President Donald Trump at the White House on Monday.

South Korean automaker Hyundai announced Monday it will invest $20 billion in the United States, including on a new steel plant in Louisiana. President Trump touted the news at the White House,

Hyundai Motor Group is set to dramatically expand its U.S. footprint, with a US$20 billion investment that includes building a new steel plant in Louisiana, according to a U.S. official

President Trump on Thursday threatened to impose heavier tariffs on Canada and the European Union if they work together to “do economic harm” to the United States, hours after he said he would impose 25 percent tariffs on imported cars and car parts.