Demonstrators assembled in Greenland's capital, Nuuk, and Denmark's capital, Copenhagen, with additional protests held across Denmark.

In Nuuk, Greenland's Prime Minister Jens-Frederik Nielsen joined thousands of protesters marching toward the U.S. consulate, holding Greenlandic flags and signs reading "Greenland is not for sale."

"It's very important that we stay together and show that Greenland is not for sale and we would not like to be an American or won't be annexed by the USA," Greenlandic politician Erik Jensen told Reuters.

In Copenhagen, demonstrators chanted "Greenland is not for sale," while holding signs reading "No means No" and "Hands off Greenland," alongside the territory's red-and-white flag, as they marched toward the U.S. embassy.

Some protesters wore red baseball caps resembling the "Make America Great Again" caps associated with Trump supporters, but bearing the slogan "Make America Go Away."

The rallies were held during a bipartisan U.S. congressional delegation's visit to Denmark. This 11-member group said it was seeking to "lower the temperature" of the situation between the U.S. and Greenland. Democratic Senator Dick Durbin told the press that "the statements being made by the president do not reflect what the American people feel."

On top of multiple annexation threats against Greenland – including remarks that the U.S. would get the island either "the easy way" or "the hard way" – Trump stated on Saturday that he would impose new tariffs on eight European countries until "a deal is reached for the complete and total purchase of Greenland." European leaders have pushed back against the threat, suggesting an "EU-level response."