.Biden preparing to shut out Nippon Steel investment of USA Steel The Washington PostU.S. Steel claims it can leave behind Pittsburgh if Nippon offer fails as Biden intends to block out takeover Pittsburgh Post-GazetteBiden Expected to Block U.S. Steel Takeover The New York City TimesExclusive|USA Steel Portend Vegetation Closings if Purchase Collapses The Commercial JournalBiden readied to shut out US Steel investment by Nippon Steel CNN.