.Biden preparing to shut out Nippon Steel acquisition of U.S. Steel The Washington PostU.S. Steel claims it could possibly leave behind Pittsburgh if Nippon deal flops as Biden organizes to shut out requisition Pittsburgh Post-GazetteBiden Expected to Block United State Steel Requisition The New York TimesExclusive|USA Steel Warns of Vegetation Closings if Purchase Breaks Down The Stock market JournalBiden readied to obstruct United States Steel purchase by Nippon Steel CNN.