.Biden readying to block out Nippon Steel acquisition of U.S. Steel The Washington PostU.S. Steel states it could leave Pittsburgh if Nippon bargain fails as Biden considers to block takeover Pittsburgh Post-GazetteBiden Expected to Block USA Steel Takeover The Nyc TimesExclusive|U.S. Steel Warns of Vegetation Closings if Purchase Breaks Down The Stock market JournalBiden prepped to obstruct US Steel purchase through Nippon Steel CNN.