.Biden readying to obstruct Nippon Steel acquisition of USA Steel The Washington PostU.S. Steel states it could possibly leave Pittsburgh if Nippon deal falls through as Biden considers to block out requisition Pittsburgh Post-GazetteBiden Expected to Block USA Steel Takeover The New York City TimesExclusive|United State Steel Warns of Vegetation Closings if Purchase Collapses The Stock market JournalBiden readied to block US Steel investment through Nippon Steel CNN.