.Biden preparing to block out Nippon Steel investment of USA Steel The Washington PostU.S. Steel states it might leave Pittsburgh if Nippon deal flops as Biden intends to block requisition Pittsburgh Post-GazetteBiden Expected to Block United State Steel Takeover The Nyc TimesExclusive|USA Steel Warns of Plant Closings if Sale Breaks Down The Exchange JournalBiden prepped to obstruct US Steel investment through Nippon Steel CNN.