.Biden prepping to block out Nippon Steel acquisition of U.S. Steel The Washington PostU.S. Steel states it could leave Pittsburgh if Nippon package falls through as Biden intends to block out requisition Pittsburgh Post-GazetteBiden Expected to Block USA Steel Takeover The The Big Apple TimesExclusive|United State Steel Portend Plant Closings if Purchase Breaks Down The Commercial JournalBiden readied to obstruct US Steel acquisition by Nippon Steel CNN.