Trump jokes on Twitter, "I promise not to do this to Greenland!"
Trump acknowledged Sunday that he is "strategically" interested in such a deal, but said it's not a priority of his administration. He told reporters, "It's not No. 1 on the burner."
Danish Prime Minister Mette Frederiksen has said Greenland is not for sale and Trump's idea of buying it is "an absurd discussion."
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