From the New York Times:
In the latest only-in-Trumpland episode skating precariously along the line between farce and tragedy, the president of the United States on Wednesday attacked the prime minister of Denmark because she will not sell him Greenland — and found the very notion “absurd.”
But while Mr. Trump has long derided nation-building, his flirtation with nation-buying turned out to be more serious than many originally thought. He has been talking privately about buying Greenland for more than a year and even detailed the National Security Council staff to study the idea.
At one point last year, according to a former official who heard him, he even joked in a meeting about trading Puerto Rico for Greenland — happy to rid himself of an American territory whose leadership he has feuded with repeatedly.