Greenland’s people are bracing for another visit from U.S. President Donald Trump’s inner circle, with second lady Usha Vance set to travel to the autonomous Danish territory this week as her husband ratchets up talk about U.S. security and “territorial” interests in the vast Arctic island coveted by the administration.

Greenland’s prime minister warned Sunday of “American aggression” and lamented a “mess” caused by the upcoming visit from Vance, who will be accompanied by Trump’s national security adviser and energy secretary. The same day, Vice President JD Vance — her husband — blasted Denmark for “not doing its job” and “not being a good ally.”

“So you have to ask yourself: How are we going to solve that problem, solve our own national security?” JD Vance said on Fox News. “If that means that we need to take more territorial interest in Greenland, that is what President Trump is going to do, because he doesn’t care about what the Europeans scream at us.”

Denmark is a NATO ally of the United States, and northwestern Greenland already houses the U.S. Pituffik military base that falls under the Pentagon’s Space Force.

Security stepped up

Danish national police Sunday sent extra personnel and sniffer dogs to Greenland as part of regular security measures taken during visits by dignitaries. A police spokesperson declined to give details, but news reports said dozens were flown in.

Before the president began his second term in January, a visit by Trump’s eldest son heightened concerns in Greenland about possible U.S. ambitions. Donald Trump Jr. told its residents that “we’re going to treat you well” — weeks before March 11 elections that had centered on possible independence from Denmark.

Greenlandic news outlet Sermitsiaq posted images of two U.S. Hercules workhorse military aircraft on the tarmac Sunday in Nuuk, the capital, adding that the planes later departed. News reports said four bulletproof cars had also been flown in.

On her visit, Vance will attend the Avannaata Qimussersu, Greenland’s national dogsled race which features about 37 mushers and 444 dogs, her office said.

Trump’s national security adviser, Mike Waltz, and Energy Secretary Chris Wright will also be travelling to Greenland, the White House said.

“The U.S. has a vested security interest in the Arctic region and it should not be a surprise the National Security Advisor and Secretary of Energy are visiting a U.S. Space Base to get first-hand briefings from our service members on the ground,” said Brian Hughes, a spokesman for the National Security Council.

Greenland is also in the process of political transition. The pro-business Demokraatit party, which favors a slow path to independence, won a surprise victory in the recent elections, outpacing the two left-leaning parties that formed the last government.