Administration officials secured a deal that will give the president unusual influence over a private company, and could serve as a model for other deals.

Donald Trump has approved the $14.9 billion partnership between US Steel and Japan’s Nippon Steel, ensuring national security guarantees and preserving the company's Pittsburgh headquarters. A unique "golden share" will give the US government final authority on key strategic decisions.

His approval capped a tumultuous 18-month effort that survived union opposition and two national security reviews.