Greenland, a self-ruling Danish territory, voted in a referendum to leave the European Communities, a precursor to the EU, in 1982 and formally left the bloc in 1985 — though most of its roughly 60,000 citizens are Danish and therefore still EU citizens.

The Danish PM's tour of three capitals betrayed the nervousness felt in Denmark over Trump's repeated comments.

European Union foreign policy chief Kaja Kallas said Monday that Europe is “not negotiating” with the United States over control of Greenland, as President Trump continues to insist that acquiring the self-governing territory of Denmark is necessary for American national security.