.Biden prepping to shut out Nippon Steel acquisition of USA Steel The Washington PostU.S. Steel states it could possibly leave Pittsburgh if Nippon package flops as Biden organizes to block takeover Pittsburgh Post-GazetteBiden Expected to Block U.S. Steel Takeover The Nyc TimesExclusive|U.S. Steel Portend Vegetation Closings if Sale Falls Down The Exchange JournalBiden prepped to obstruct US Steel purchase by Nippon Steel CNN.