Gov Landry said in a post on X it was an honour to serve in a “volunteer position to make Greenland a part of the US”.

The move has angered Copenhagen, which said it would will call the US ambassador for “an explanation”. Greenland’s prime minister said the island must “decide our own future” and its “territorial integrity must be respected”.

Since returning to the White House in January, Trump has revived his long-standing interest in Greenland, citing its strategic location and mineral wealth.

He has refused to rule out using force to secure control of the island, a stance that has shocked Denmark, a Nato ally that has traditionally enjoyed close relations with Washington.