President Donald Trump would have unique influence over the operations of U.S. Steel under the terms of what the White House calls an “investment” being made by Japan-based Nippon Steel in the iconic American steelmaker.

The partnership between US Steel Corp and Nippon Steel Corp has reached a new phase, with an agreement on US national security guarantees, in addition to the so-called “golden share” advantage obtained by US President Donald Trump’s administration.

The structure of a newly proposed United States Steel and Nippon Steel partnership has yet to be unveiled by either company.