.Biden preparing to block out Nippon Steel investment of USA Steel The Washington PostU.S. Steel mentions it can leave behind Pittsburgh if Nippon bargain flops as Biden organizes to block out takeover Pittsburgh Post-GazetteBiden Expected to Block United State Steel Takeover The The Big Apple TimesExclusive|U.S. Steel Portend Plant Closings if Sale Falls Down The Stock market JournalBiden prepared to obstruct US Steel investment by Nippon Steel CNN.