Kamala Harris, the Democratic Vice President nominee, emphasized the importance of keeping U.S. Steel under American ownership and operation during a campaign event in Pittsburgh. This stance dealt a blow to Japanese manufacturer Nippon Steel's $15 billion bid to acquire U.S. Steel, which has been opposed by the United Steelworkers union and received disapproval from President Biden and Donald J. Trump. Nippon Steel has been striving to demonstrate the benefits of the merger, including promises of additional investment in U.S. Steel's facilities and withdrawal from a joint venture in China. The Committee on Foreign Investment in the United States is examining the national security implications of the proposal, with the final decision resting with the president. Nippon Steel remains optimistic about the merger's prospects, believing that a fair regulatory review process will support the outcome.