.Biden preparing to shut out Nippon Steel purchase of USA Steel The Washington PostU.S. Steel states it might leave behind Pittsburgh if Nippon package fails as Biden intends to block 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 Collapses The Wall Street JournalBiden prepared to block out US Steel investment through Nippon Steel CNN.