President Joe Biden decided to block the $14 billion takeover of US Steel by Japan’s Nippon Steel even though some top US officials did not believe there were sufficient national security grounds to kill the deal,

President Biden blocked Nippon Steel's acquisition of U.S. Steel citing national security concerns, a rationale which has drawn criticism from the companies and other observers.

Nippon Steel and U.S. Steel are unlikely to convince a court to scrap President Joe Biden's decision to block their $14.9 billion merger, but their lawsuit could give them more time to reach a deal with incoming President Donald Trump.