.Biden readying to shut out Nippon Steel investment of USA Steel The Washington PostU.S. Steel states it could leave Pittsburgh if Nippon bargain falls through as Biden plans to shut out requisition Pittsburgh Post-GazetteBiden Expected to Block USA Steel Requisition The Nyc TimesExclusive|U.S. Steel Portend Plant Closings if Purchase Collapses The Exchange JournalBiden prepared to shut out United States Steel purchase by Nippon Steel CNN.