U.S. Vice President J.D. Vance speaks at a U.S. space base in Greenland.

U.S. Vice-President JD Vance slammed Denmark during a visit to Greenland on Friday, saying it has not done a good job in keeping the semi-autonomous Danish territory and its people safe from incursions by China and Russia, while pledging respect for Greenland's sovereignty and asking its people 'to partner' with the United States.