By Alexandra Alper (Reuters) -U.S President Donald Trump approved Nippon Steel's $14.9 billion bid for U.S. Steel on Friday, capping a tumultuous 18-month effort by the companies that survived union opposition and two national security reviews.

Donald Trump has approved Nippon Steel’s $14.9bn bid for US Steel after an agreement to settle national security concerns swayed the US president into backing the takeover.

Missouri Governor Mike Kehoe on Thursday declared a State of Emergency and activated the Missouri National Guard in anticipation of protests across the state.