Greenland Prime Minister Jens-Frederik Nielsen said Monday that the Arctic island would not be pressured over U.S. President Donald Trump’s tariff threats.

His comments come shortly after Nielsen joined protesters in Nuuk, Greenland’s capital, over the weekend, where people marched to demonstrate against Trump’s push to take control of the self-governing Danish territory.

On Saturday, the U.S. president threatened to impose a rising wave of tariffs against eight European countries for their opposition to his campaign.

European political leaders called the proposed tariffs “unacceptable” and vowed to stand behind Denmark, which is responsible for the island’s foreign, defense, and security policies.

In a social media post, Greenland’s Nielsen said the recent demonstrations in Greenland and in Denmark had shown “a strong and dignified unity.”