Since the only thing Trump understands is force, I am looking forward to the retaliation from and military positioning of EU member states to defend Greenland. Perhaps it is what is needed to finally impeach.
Impeaching happens when the President is held accountable, only dissatisfaction in the electorate will cause that. Trump has already committed many crimes that he could be held accountable for. If the EU pressures the US, and it messes with the quality of life, that creates pressure on him as well. It all trickles, until it becomes a storm.
7. If a Member State is the victim of armed aggression on its territory, the other Member States shall have towards it an obligation of aid and assistance by all the means in their power, in accordance with Article 51 of the United Nations Charter. This shall not prejudice the specific character of the security and defence policy of certain Member States.
