NATO is reportedly mulling a proposal to Donald Trump that would ease tensions caused by the US president's fixation with annexing Greenland.

Greenland plans to ban foreign and anonymous donations to its political parties after the Trump administration has said the US president is serious about taking control of the vast Arctic island. The government of Greenland on Monday put forward an emergency parliamentary proposal to safeguard the country’s “political integrity” ahead of elections due by April 6.

Denmark’s Prime Minister has insisted Greenland is not for sale and called for a robust response from her European Union partners should US President Donald Trump press ahead with his threat to take control of the island.

When it comes to Donald Trump's ambitions to take control of Greenland, the message from the island's minister for trade and business is abundantly clear: "We are not for sale."

Greenland's government is urging swift consideration of a bill that aims to "protect Greenland's political integrity."

Greenland is bracing for a record influx of American tourists this summer as Donald Trump plots the island’s takeover in a push for military dominance of the Arctic.

Denmark said on Monday it would spend 14.6 billion Danish kroner ($2.05 billion) boosting its military capabilities in the Arctic – a decision that comes amid continuing furor following US President Donald Trump’s renewed interest in controlling Greenland,