.Biden readying to block Nippon Steel investment of united state Steel The Washington PostU.S. Steel mentions it might leave Pittsburgh if Nippon bargain falls through as Biden intends to shut out requisition Pittsburgh Post-GazetteBiden Expected to Block USA Steel Requisition The The Big Apple TimesExclusive|USA Steel Warns of Vegetation Closings if Sale Breaks Down The Stock market JournalBiden prepped to block US Steel acquisition by Nippon Steel CNN.