.Biden preparing to shut out Nippon Steel purchase of USA Steel The Washington PostU.S. Steel states it could possibly leave behind Pittsburgh if Nippon bargain flops as Biden prepares to block requisition Pittsburgh Post-GazetteBiden Expected to Block United State Steel Requisition The Nyc TimesExclusive|U.S. Steel Warns of Vegetation Closings if Sale Breaks Down The Commercial JournalBiden prepared to obstruct US Steel investment through Nippon Steel CNN.