.Biden preparing to shut out Nippon Steel investment of U.S. Steel The Washington PostU.S. Steel states it might leave Pittsburgh if Nippon bargain fails as Biden organizes to block out takeover Pittsburgh Post-GazetteBiden Expected to Block U.S. Steel Takeover The Nyc TimesExclusive|United State Steel Portend Vegetation Closings if Purchase Falls Down The Stock market JournalBiden prepped to block out United States Steel purchase by Nippon Steel CNN.