.Biden readying to shut out Nippon Steel investment of USA Steel The Washington PostU.S. Steel claims it could possibly leave Pittsburgh if Nippon deal flops as Biden prepares to block requisition Pittsburgh Post-GazetteBiden Expected to Block U.S. Steel Takeover The New York TimesExclusive|United State Steel Portend Plant Closings if Purchase Falls Down The Exchange JournalBiden prepared to obstruct US Steel acquisition through Nippon Steel CNN.