.Biden readying to obstruct Nippon Steel acquisition of USA Steel The Washington PostU.S. Steel states it could possibly leave behind Pittsburgh if Nippon package falls through as Biden prepares to shut out takeover Pittsburgh Post-GazetteBiden Expected to Block U.S. Steel Requisition The Nyc TimesExclusive|U.S. Steel Portend Vegetation Closings if Sale Collapses The Commercial JournalBiden readied to obstruct US Steel acquisition through Nippon Steel CNN.