.Biden readying to block out Nippon Steel acquisition of USA Steel The Washington PostU.S. Steel states it could leave behind Pittsburgh if Nippon bargain fails as Biden considers to block out requisition Pittsburgh Post-GazetteBiden Expected to Block U.S. Steel Takeover The New York TimesExclusive|USA Steel Portend Plant Closings if Purchase Breaks Down The Stock market JournalBiden prepared to shut out United States Steel acquisition through Nippon Steel CNN.