.Biden prepping to block out Nippon Steel investment of U.S. Steel The Washington PostU.S. Steel claims it might leave behind Pittsburgh if Nippon offer flops as Biden prepares to shut out takeover Pittsburgh Post-GazetteBiden Expected to Block United State Steel Requisition The The Big Apple TimesExclusive|USA Steel Warns of Vegetation Closings if Purchase Breaks Down The Exchange JournalBiden prepared to block out United States Steel acquisition by Nippon Steel CNN.