.Biden prepping to shut out Nippon Steel purchase of U.S. Steel The Washington PostU.S. Steel states it might leave behind Pittsburgh if Nippon offer fails as Biden plans to obstruct takeover Pittsburgh Post-GazetteBiden Expected to Block USA Steel Requisition The New York TimesExclusive|USA Steel Portend Plant Closings if Purchase Breaks Down The Exchange JournalBiden prepared to block United States Steel acquisition through Nippon Steel CNN.