European Commission President Ursula von der Leyen met with several U.S. lawmakers on Monday, urging them to promote policies that “unequivocally respect the sovereignty of” Denmark and its territory of Greenland.

The EU chief met with lawmakers from a bipartisan delegation, led by Sen. Chris Coons (D-DE), that traveled to Copenhagen over the weekend to meet with Danish officials and demonstrate congressional support for the NATO ally. The delegation’s trip and meeting with von der Leyen come as President Donald Trump continues to publicly express his desire to acquire Greenland from Denmark for national security purposes.