.Biden readying to block out Nippon Steel acquisition of united state Steel The Washington PostU.S. Steel says it can leave Pittsburgh if Nippon deal fails as Biden organizes to obstruct takeover Pittsburgh Post-GazetteBiden Expected to Block United State Steel Requisition The New York TimesExclusive|United State Steel Portend Plant Closings if Sale Breaks Down The Stock market JournalBiden prepped to shut out US Steel acquisition through Nippon Steel CNN.