.Biden readying to block out Nippon Steel acquisition of united state Steel The Washington PostU.S. Steel states it could possibly leave behind Pittsburgh if Nippon offer fails as Biden considers to block takeover Pittsburgh Post-GazetteBiden Expected to Block U.S. Steel Takeover The The Big Apple TimesExclusive|United State Steel Warns of Vegetation Closings if Sale Breaks Down The Commercial JournalBiden prepped to shut out US Steel purchase by Nippon Steel CNN.