Nippon Steel and US Steel sue after Joe Biden blocks $15bn deal Financial TimesU.S. Steel and Nippon Sue Biden Over Decision to Block Merger The New York TimesU.S. Steel sues to salvage its sale to Japan's Nippon Steel NPRBiden rejected appeals of several top advisers in blocking U.S. Steel bid The Washington PostNippon Steel may sue US government over Biden's decision to block US Steel acquisition CNN