.Biden prepping to block out Nippon Steel purchase of USA Steel The Washington PostU.S. Steel mentions it could leave behind Pittsburgh if Nippon offer flops as Biden prepares to block out takeover Pittsburgh Post-GazetteBiden Expected to Block USA Steel Requisition The The Big Apple TimesExclusive|USA Steel Portend Vegetation Closings if Sale Collapses The Wall Street JournalBiden readied to obstruct US Steel purchase by Nippon Steel CNN.