.Biden preparing to shut out Nippon Steel purchase of USA Steel The Washington PostU.S. Steel states it might leave Pittsburgh if Nippon bargain falls through as Biden organizes to block out requisition Pittsburgh Post-GazetteBiden Expected to Block USA Steel Takeover The New York City TimesExclusive|United State Steel Portend Plant Closings if Purchase Falls Down The Commercial JournalBiden prepped to shut out US Steel investment through Nippon Steel CNN.