WASHINGTON, Aug. 22 -- US Secretary of State Mike Pompeo has praised Denmark after a row over Greenland prompted US President Donald Trump to cancel his visit to the country.

Secretary of State Pompeo talked to Danish Foreign Minister Jeppe Kofod over phone and expressed appreciation for Denmark's co-operation as a US ally.

Mr Kofod welcomed the "frank, friendly and constructive talk".

It came after Mr Trump said Denmark's prime minister had been "nasty" when rebuffing his idea of buying Greenland.

Mette Frederiksen had called his ambitions of buying the autonomous Danish territory "absurd". She said she was "disappointed and surprised" that he had cancelled his visit.

The trip was scheduled to take place on 2 September, at the invit...