European officials are reportedly exploring unprecedented economic and security retaliation options in response to Donald Trump’s renewed push to bring Greenland under U.S. control, but such measures remain at the level of internal brainstorming rather than agreed policy. According to these accounts, ideas range from sanctions on major U.S. tech and financial firms to even questioning the long‑term status of some U.S. military basing arrangements in Europe, highlighting how sensitive Greenland has become inside the trans‑Atlantic relationship.