.Biden readying to block out Nippon Steel investment of USA Steel The Washington PostU.S. Steel says it could possibly leave Pittsburgh if Nippon deal flops as Biden prepares to obstruct requisition Pittsburgh Post-GazetteBiden Expected to Block USA Steel Takeover The The Big Apple TimesExclusive|USA Steel Portend Plant Closings if Purchase Collapses The Wall Street JournalBiden prepared to block US Steel acquisition through Nippon Steel CNN.