.Biden prepping to block out Nippon Steel investment of USA Steel The Washington PostU.S. Steel claims it could possibly leave behind Pittsburgh if Nippon package falls through as Biden prepares to shut out takeover Pittsburgh Post-GazetteBiden Expected to Block USA Steel Requisition The The Big Apple TimesExclusive|United State Steel Warns of Vegetation Closings if Sale Breaks Down The Commercial JournalBiden prepped to block US Steel purchase by Nippon Steel CNN.