.Biden preparing to shut out Nippon Steel investment of united state Steel The Washington PostU.S. Steel mentions it could possibly leave behind Pittsburgh if Nippon bargain flops as Biden organizes to block requisition Pittsburgh Post-GazetteBiden Expected to Block USA Steel Takeover The New York City TimesExclusive|U.S. Steel Warns of Plant Closings if Purchase Falls Down The Stock market JournalBiden prepared to block out US Steel purchase through Nippon Steel CNN.