.Biden prepping to block out Nippon Steel investment of USA Steel The Washington PostU.S. Steel states it could leave Pittsburgh if Nippon bargain fails as Biden organizes to block requisition Pittsburgh Post-GazetteBiden Expected to Block USA Steel Requisition The New York City TimesExclusive|USA Steel Warns of Vegetation Closings if Purchase Breaks Down The Exchange JournalBiden prepped to block United States Steel investment through Nippon Steel CNN.