.Biden readying to block out Nippon Steel investment of U.S. Steel The Washington PostU.S. Steel claims it could leave behind Pittsburgh if Nippon offer falls through as Biden plans to obstruct requisition Pittsburgh Post-GazetteBiden Expected to Block USA Steel Requisition The New York TimesExclusive|United State Steel Warns of Vegetation Closings if Sale Falls Down The Stock market JournalBiden prepped to obstruct United States Steel investment by Nippon Steel CNN.