What are the realistic expectations for Ukraine's territorial sovereignty and NATO membership prospects in potential peace negotiations with Russia?

According to Defense Secretary Pete Hegseth's statements at NATO headquarters, both Ukraine's NATO membership and the goal of regaining all territory seized by Russia since 2014 are unrealistic objectives. This blunt assessment represents a significant shift in American diplomatic positioning, effectively conceding two major Ukrainian aspirations before formal peace negotiations begin. Critics argue this approach undermines America's negotiating leverage with Russia, as it preemptively addresses Putin's key demands without securing reciprocal concessions.