Trump pledged to block U.S. Steel merger with Nippon, but his inner circle is pushing for the deal TribLIVECleveland Cliffs offers to buy unionized mills US Steel is threatening to close CNNBiden preparing to block Nippon Steel purchase of U.S. Steel The Washington PostU.S. Steel Threatens to Go Rogue The American ProspectShapiro steps up negotiations as Biden’s potential block of U.S. Steel deal jolts region Pittsburgh Post-Gazette