President Trump has advanced U.S. Arctic interests through a September 2026 trilateral security agreement signed at the UN General Assembly with Danish and Greenlandic leaders, expanding military access at existing and new sites like Pituffik, Narsarsuaq, and Mestersvig while excluding adversaries from sensitive investments. The accord, which remains subject to parliamentary ratification in Copenhagen and Nuuk, emphasizes permanent U.S. defense roles without altering Danish sovereignty or Greenlandic self-determination. Earlier 2026 efforts included envoy visits and public statements on basing and resources, but Trump has conducted diplomacy remotely. No personal presidential trip has occurred since the deal's announcement, with traders likely weighing scheduled UN or NATO events, ratification timelines, and any late-year White House travel plans against the precedent of proxy engagement.