Pakistan, Jan. 23 -- President Donald Trump warned Thursday of major reprisals if European countries dumped key holdings of US Treasury bonds to pressure Washington, as temperatures fluctuated over the future of Greenland.

"If that would happen, there would be a big retaliation on our part, and we have all the cards," Trump said on Fox Business Network's "Mornings with Maria."

But he acknowledged that European countries had notable holdings of US Treasury securities.

Trump's remarks came after tensions flared over the fate of the autonomous Danish territory of Greenland - which the US leader covets.

The American president has repeatedly said that the United States, the key force in NATO, deserves Greenland as it would be forced to def...