United Steelworkers President David McCall urged President Donald Trump to block Nippon Steel Corp.’s bid to purchase United States Steel Corp., reiterating his opposition to the controversial proposed merger.

The United Steelworkers union urged U.S. President Donald Trump on Thursday to block Nippon Steel's bid for U.S. Steel despite a pledge by the Japanese steel giant to invest $14 billion in the iconic American company,

A powerful U.S. national security panel on Wednesday submitted a recommendation to President Donald Trump on Nippon Steel's fraught $14.9 billion bid for U.S. Steel, a person familiar with the matter said,