.Biden readying to block out Nippon Steel acquisition of USA Steel The Washington PostU.S. Steel mentions it might leave behind Pittsburgh if Nippon package fails as Biden organizes to obstruct takeover Pittsburgh Post-GazetteBiden Expected to Block USA Steel Takeover The New York City TimesExclusive|U.S. Steel Portend Plant Closings if Sale Breaks Down The Commercial JournalBiden prepped to block out US Steel acquisition by Nippon Steel CNN.