U.S. President Donald Trump has praised General Motors' decision to shut down one of its four plants in South Korea, saying "they're going to move back to Detroit."  

Meeting with a group of Republican and Democratic lawmakers at the White House on Tuesday, Trump also vowed to revise or scrap the free trade agreement(FTA) with South Korea. 

He said that Washington has a very bad trade deal with Seoul which has produced nothing but losses for the U.S. 

He said the 2012 deal "was a disaster" and that the U.S. would renegotiate a "fair deal" or scrap it altogether. 

Taking aim at China, Trump accused Beijing of decimating American steel and aluminum industries, saying he was "considering all options," including tariffs and quotas.