( June 26, 2026, 1:34 PM EDT) -- DENVER — Ruling that a lower court’s dismissal of a challenge to presidential proclamations related to the boundaries of two national monuments was based on a “flawed view of sovereign immunity’s ultra vires exception,” a divided panel of the 10th Circuit U.S. Court of Appeals remanded a long-running case, reviving a dispute over presidential authority under the Antiquities Act in a case that may have implications for hydraulic fracturing....