.Biden preparing to block out Nippon Steel investment of USA Steel The Washington PostU.S. Steel mentions it can leave Pittsburgh if Nippon package falls through as Biden considers to obstruct takeover Pittsburgh Post-GazetteBiden Expected to Block USA Steel Requisition The The Big Apple TimesExclusive|U.S. Steel Portend Plant Closings if Purchase Breaks Down The Commercial JournalBiden readied to block out United States Steel acquisition by Nippon Steel CNN.