.Biden preparing to shut out Nippon Steel acquisition of united state Steel The Washington PostU.S. Steel says it could possibly leave Pittsburgh if Nippon deal flops as Biden organizes to block takeover Pittsburgh Post-GazetteBiden Expected to Block USA Steel Requisition The New York TimesExclusive|U.S. Steel Portend Vegetation Closings if Purchase Breaks Down The Stock market JournalBiden prepared to obstruct US Steel purchase by Nippon Steel CNN.