.Biden preparing to shut out Nippon Steel purchase of united state Steel The Washington PostU.S. Steel states it could leave Pittsburgh if Nippon package falls through as Biden prepares to obstruct takeover Pittsburgh Post-GazetteBiden Expected to Block United State Steel Takeover The Nyc TimesExclusive|United State Steel Portend Vegetation Closings if Sale Collapses The Stock market JournalBiden readied to block out United States Steel purchase through Nippon Steel CNN.