.Biden prepping to shut out Nippon Steel acquisition of united state Steel The Washington PostU.S. Steel mentions it could leave Pittsburgh if Nippon deal fails as Biden prepares to obstruct takeover Pittsburgh Post-GazetteBiden Expected to Block United State Steel Requisition The New York City TimesExclusive|U.S. Steel Portend Plant Closings if Purchase Falls Down The Commercial JournalBiden prepared to shut out United States Steel acquisition by Nippon Steel CNN.