.Biden preparing to shut out Nippon Steel acquisition of U.S. Steel The Washington PostU.S. Steel states it can leave Pittsburgh if Nippon bargain falls through as Biden considers to shut out takeover Pittsburgh Post-GazetteBiden Expected to Block United State Steel Requisition The New York City TimesExclusive|United State Steel Portend Plant Closings if Purchase Falls Down The Stock market JournalBiden readied to block out US Steel purchase through Nippon Steel CNN.