.Biden prepping to shut out Nippon Steel investment of united state Steel The Washington PostU.S. Steel says it could possibly leave Pittsburgh if Nippon package flops as Biden plans to block takeover Pittsburgh Post-GazetteBiden Expected to Block U.S. Steel Takeover The Nyc TimesExclusive|United State Steel Warns of Vegetation Closings if Purchase Collapses The Commercial JournalBiden prepared to block out US Steel acquisition through Nippon Steel CNN.