Denmark has not found it relevant to spend tax payer money on a large military base on Greenland. Instead Denmark gives a yearly grant of 620 million dollars to the 57,000 Greenlanders, which is spent on everything in the Greenland budget including having free healthcare, free access to universities in Denmark AND a well functioning police force.
Vance now abuses that fact to claim that Denmark has not kept Greenland safe, and therefore Greenland should become American.