.Biden prepping to block Nippon Steel investment of united state Steel The Washington PostU.S. Steel mentions it could possibly leave behind Pittsburgh if Nippon offer falls through as Biden plans to obstruct takeover Pittsburgh Post-GazetteBiden Expected to Block United State Steel Takeover The The Big Apple TimesExclusive|U.S. Steel Warns of Vegetation Closings if Sale Falls Down The Stock market JournalBiden readied to block out United States Steel acquisition through Nippon Steel CNN.