For US President Donald Trump, mocking a country or a leader is not just a reality TV-style soundbite; it is an early warning sign of military action. Trump scorned Nicolas Maduro for "playing tough" before snatching the Venezuelan leader. Now he contemptuously talks of Denmark "adding two more dog sleds" to defend Greenland. Europe does appear to be taking this latest threat seriously. But can European countries actually stop Trump from taking over Greenland? And how do they navigate this crisis when they also have to stay focused on Ukraine? We put these questions to Rasmus Jarlov, chair of the defence committee in the Danish parliament.