WASHINGTON/TOKYO (Reuters) - U.S. President Joe Biden has decided to officially block Nippon Steel's proposed $14.9-billion purchase of U.S. Steel, a person familiar with the decision said on Friday, putting an end to a long-running and contentious merger plan. The Committee on Foreign Investment in the United States (CFIUS) had previously referred the decision to approve or block the deal...

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(Reuters) -U.S. President Joe Biden has decided to officially block Nippon Steel's proposed purchase of U.S. Steel, a person familiar with the decision said on Friday. Biden, President-elect Donald Trump and a politically-influential labour union had voiced opposition to Nippon Steel's acquisition of U.S. Steel, which helped build the Empire State Building and arm allied forces in World War Two....

* White House declines comment on reports of Biden's decision * CFIUS referred decision to Biden amid concern over U.S.-Japan ties * Nippon Steel ( NISTF ) offered concessions, including U.S. HQ move and production veto power (Changes attribution in headline, paragraph 1) By David Shepardson WASHINGTON/TOKYO, Jan 2 (Reuters) - U.S. President Joe Biden has decided to officially block...