Presidential authority over international geographic nomenclature remains tightly constrained by longstanding diplomatic protocols and multilateral agreements. Renaming an ocean would require coordinated approval from bodies such as the International Hydrographic Organization and broad consensus among coastal nations, with no executive orders, legislative initiatives, or public statements from the administration signaling intent to pursue such a step. The 95.5% implied probability for no reflects these procedural and diplomatic barriers alongside the absence of any supporting campaign commitments or policy momentum. Narrow scenarios that could still shift sentiment include major new maritime discoveries or multilateral summits producing unexpected name-change proposals, though even those developments would face extended ratification timelines extending beyond 2026.