Despite Trump’s optimism, the harsh climate of Greenland — a self-governing territory of Denmark, rather than a part of the United States — as well as a lack of infrastructure have foiled all previous attempts to extract so-called rare earth minerals, as well as oil and gas. No efforts have ever progressed beyond the exploratory stage.

Trump posted on his Truth Social platform following a campaign event Tuesday in Wasilla, Alaska, to stump for Republican U.S. Sen. Dan Sullivan as he seeks his third term to represent the state in an election against Democratic former U.S. congresswoman Mary Peltola.

Rising energy prices — a direct result of Trump’s war in Iran — are creating serious and sustained financial hardships for America’s working class ahead of the midterm elections next month. Trump’s comments Wednesday are likely aimed at addressing voters’ concerns before they head to the polls.

A recent deal paved the way for more US bases but didn’t offer exploration rights

Last month Trump signed an agreement with the leaders of Denmark and Greenland to strengthen security in the Arctic and North Atlantic, following months of tensions with NATO allies over the U.S. president’s repeated demands to take control of the semiautonomous Danish territory. It does not grant the U.S. any special exploration rights, but does place some limits on investments by non-NATO countries in strategic sectors.

The deal also paved the way for more U.S. bases in Greenland and eased tensions over Trump’s repeated calls for Greenland to become part of the United States. The agreement would still apply if Greenland eventually chooses independence.

Trump has expressed his desire to acquire Greenland since 2019 and, during his second term, issued threats to seize the territory from Denmark, a NATO ally.

Representatives from Denmark’s Ministry of Foreign Affairs, as well as from Greenland’s prime minister and the island’s mining ministry, did not immediately return requests for comment Wednesday.

Naaja H. Nathanielsen, who represents Greenland at the Danish parliament, told Danish broadcaster TV2 that she believes Trump used his post to get attention.

She said she does not attach significance to Trump calling the island “our Greenland.”

Greenland has valuable resources

Greenland has large deposits of the rare earth minerals that are needed to make everything from computers and smartphones to the batteries, solar and wind technologies that will power the transition away from fossil fuels. China currently dominates the world’s supply of these critical minerals and the Trump administration is seeking to break Beijing’s chokehold on them.

The U.S. Geological Survey has also identified major potential offshore deposits of oil and natural gas.

But tapping these resources could be prohibitively difficult: the rare earth minerals are encased in rock, and the offshore oil and natural gas deposits are covered by Arctic ice.

Trump boasts about Greenland’s strategic spot in the Arctic

Trump’s Truth Social post also touted Greenland’s strategic location, saying that “from a Security Purpose in the Defense and Offense of both the United States of America, and Europe,” the island is “second to none.”

“Any future attack on the United States will have to come across Greenland, where our Defense will routinely knock down drones, missiles, or any other form of weapon not yet even conceived,” he wrote. “It gives us time, location, and sightline, like nowhere else in the World!”

The United States was prominent in Greenland for decades but, since 1945, the U.S. military presence in Greenland has decreased from thousands of soldiers on 17 bases and installations to roughly 200 soldiers on the remote Pituffik Space Base in the northwest. The base supports missile warning, missile defense and space surveillance operations for the U.S. and NATO.

Trump said last month that the U.S. would “immediately begin the process of developing a large military presence in the appropriate locations,” including “building two very major military bases.”