The sale of U.S. Steel to Nippon Steel was initially blocked by President Biden on national security grounds but later approved by President Trump with a unique 'golden share' arrangement, giving the U.S. government veto power without ownership. This deal reflects broader shifts in how foreign investments are reviewed, particularly through CFIUS, and how governments use tools like golden shares to maintain influence over strategic industries. While the deal protects jobs and allows foreign investment, some economists worry it could deter future investment and complicate free-market principles in manufacturing.