.Biden preparing to shut out Nippon Steel investment of united state Steel The Washington PostU.S. Steel says it might leave Pittsburgh if Nippon bargain falls through as Biden intends to block out takeover Pittsburgh Post-GazetteBiden Expected to Block U.S. Steel Requisition The The Big Apple TimesExclusive|USA Steel Warns of Plant Closings if Purchase Breaks Down The Wall Street JournalBiden prepped to obstruct United States Steel purchase through Nippon Steel CNN.