TOKYO (Reuters) - Japan's biggest steelmaker Nippon Steel ( NISTF ), which is seeking to acquire U.S. Steel, said on Wednesday if its purchase goes ahead core senior management as well as a majority of board members at the U.S. company would be U.S. citizens.

U.S. Steel's board would also include three independent directors who are U.S. citizens, the Japanese company said in a statement.

The announcement follows Democratic presidential candidate Kamala Harris echoing President Joe Biden's concern over U.S. Steel being acquired by Nippon Steel ( NISTF ).