If boat trips from a few hundred years ago are not a claim of ownership, then why should this just apply for Denmark in Greenland, and not also for the European colonizers in North America?
Donald Trump has grandiose and sometimes extravagant plans to resolve conflicts across continents, but in reality he always struggles to implement them.
What is clear is that the American judicial system abhors delay. The Americans believe justice must be done fairly, but must also be done swiftly, and they implemented legislation over 40 years ago to do just that.