Donald Trump has made people feel “insecure” and not shown Greenland “respect”, its prime minister has warned on the eve of elections on the Arctic island.

Speaking to Congress last Tuesday, the US president vowed to take over Danish-owned Greenland “one way or another”.

Just 24 hours before polls opened, he promised to make Greenlanders “rich” if they joined the US.

Mr Trump’s earlier demand to buy the mineral-rich autonomous territory for security reasons had been rebuffed by Mute Egede, Greenland’s prime minister, and Mette Fredericksen, the leader of Denmark.

“There is a world order that is faltering on many fronts – and a president of the United States who is very unpredictable – in such a way that makes people feel insecure,” Mr Egede said, before Greenlanders cast their ballots on Tuesday.

“We deserve to be treated with respect, and I don’t think the US president has done that recently since he took office,” he told Danish public radio on Monday.

“We will continue to KEEP YOU SAFE, as we have since World War II. We are ready to INVEST BILLIONS OF DOLLARS to create new jobs and MAKE YOU RICH,” Mr Trump had posted on social media.

“And, if you so choose, we welcome you to be a part of the greatest nation anywhere in the world, the United States of America!”.