.Biden prepping to obstruct Nippon Steel investment of USA Steel The Washington PostU.S. Steel claims it can leave behind Pittsburgh if Nippon package falls through as Biden plans to shut out takeover Pittsburgh Post-GazetteBiden Expected to Block U.S. Steel Takeover The New York City TimesExclusive|United State Steel Portend Plant Closings if Sale Breaks Down The Commercial JournalBiden prepared to shut out US Steel acquisition through Nippon Steel CNN.