.Biden readying to shut out Nippon Steel purchase of united state Steel The Washington PostU.S. Steel states it could possibly leave Pittsburgh if Nippon offer flops as Biden considers to block requisition Pittsburgh Post-GazetteBiden Expected to Block USA Steel Takeover The New York City TimesExclusive|USA Steel Warns of Vegetation Closings if Purchase Breaks Down The Exchange JournalBiden prepared to shut out US Steel purchase through Nippon Steel CNN.