.Biden prepping to obstruct Nippon Steel purchase of united state Steel The Washington PostU.S. Steel says it could possibly leave Pittsburgh if Nippon package falls through as Biden considers to block takeover Pittsburgh Post-GazetteBiden Expected to Block United State Steel Takeover The The Big Apple TimesExclusive|USA Steel Portend Vegetation Closings if Sale Falls Down The Stock market JournalBiden prepared to block US Steel acquisition through Nippon Steel CNN.