.Biden preparing to obstruct Nippon Steel investment of USA Steel The Washington PostU.S. Steel states it can leave behind Pittsburgh if Nippon package fails as Biden prepares to shut out requisition Pittsburgh Post-GazetteBiden Expected to Block USA Steel Requisition The The Big Apple TimesExclusive|U.S. Steel Portend Plant Closings if Sale Falls Down The Exchange JournalBiden prepped to block US Steel acquisition through Nippon Steel CNN.