Trump’s Threats to Greenland Raise Serious Questions for NATO NYT | Top Stories By: Lara Jakes 14 January 2026 at 23:50 The treaty that created NATO did not contemplate an attack by one ally on another. A seizure of Greenland by President Trump would test the endurance of the mutual-defense pact. © Ivor Prickett for The New York TimesA frozen corner of the main fishing harbor in Nuuk, the capital of Greenland.