Danish leaders openly mock Donald Trump after he cancels his visit because the Prime Minister told him “Greenland is not for sale” after he expressed interest in purchasing the mineral-rich country.

“I strongly hope that this is not meant seriously,” PM Mette Frederiksen said. She also said the cancellation was surprising since preparations for the visit were already underway.

“Greenland is rich in valuable resources such as minerals, the purest water and ice, fish stocks, seafood, renewable energy and is a new frontier for adventure tourism. We’re open for business, not for sale,” the governmentsaid in a statement.

Instead of letting it go, Trump invoked his go-to word — nasty. He attacked Frederiksen because she said his proposal was absurd.

MP Michael Aastrup Jensen told the Washington Post that Trump’s behavior portrays a lack of “even basic diplomatic skills” and is “an insult from a close friend and ally.”

Danish Social Liberal Party leader Morten Ostergaard said, “The man is unpredictable. Reality surpasses imagination,” Reuters reports.

MP Kristian Jensen tweeted: “Total chaos” and a “diplomatic crisis.”

Other Danish leaders mocked Donald Trump on Twitter: