The federal government will also have say over U.S. board members in a tie-up between Japan’s Nippon Steel and U.S. Steel, according to a lawmaker.

Nippon Steel Corp. plans to invest $14 billion in United States Steel Corp. if the Trump administration approves the merger of the companies, Reuters reported.Details of the plan include Nippon Steel investing $4 billion in a new steel mill,

Nippon Steel plans to invest $14 billion in U.S. Steel's operations including up to $4 billion in a new steel mill if the Trump administration green lights its bid for the iconic U.S. company, according to a document and three people familiar with the matter.

What remains of U.S. Steel's footprint locally is centered in the Mon Valley. With the sale to Nippon on the table, many local leaders are pondering what the future looks like either with or without U.

President Trump endorsed a plan that would link the U.S. and Japanese steel makers that had been blocked on national security grounds.