.Biden readying to shut out Nippon Steel purchase of U.S. Steel The Washington PostU.S. Steel mentions it can 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 New York City TimesExclusive|United State Steel Warns of Vegetation Closings if Sale Breaks Down The Wall Street JournalBiden readied to block out United States Steel acquisition through Nippon Steel CNN.