.Biden readying to block out Nippon Steel investment of USA Steel The Washington PostU.S. Steel states it might leave behind Pittsburgh if Nippon package fails as Biden considers to shut out requisition Pittsburgh Post-GazetteBiden Expected to Block USA Steel Takeover The New York City TimesExclusive|U.S. Steel Portend Vegetation Closings if Sale Breaks Down The Stock market JournalBiden readied to block United States Steel purchase through Nippon Steel CNN.