But the Government minister insisted the UK has been able to have a “sensible dialogue” with Washington on a number of diplomatic spats.

She told Sunday with Laura Kuenssberg: “Our relationship with the United States has always been one where we’ve at times differed but worked very closely together, nowhere more so than in relation to security. And that has been the case under this President as well.

“There have been a number of times where we’ve had disagreements with the US administration, but where we’ve been able to have a sensible dialogue with them, many of these issues are in the US’s interest, not just the UK, to have a sensible dialogue.”

Ms Kuenssberg then hit back: “A sensible dialogue? About threatening allies?” Ms Nandy insisted: “I, I, I think you have to look at the results that we’ve got from the relationship we’ve been able to forge with the United States and with our European counterparts.

“The Prime Minister is one of the only people in the World who can pick up the phone and help to make sure we get to a place that we’ve got to in Ukraine.”

The US president announced a 10 per cent tariff on all goods sent to the US by Britain and seven European allies from Feb 1. The levy will rise to 25 per cent on June 1, unless Britain and other European countries agree to let him take control of the Danish territory.

Mr Trump said on Saturday: “We have subsidised Denmark, and all of the countries of the European Union, and others, for many years by not charging them tariffs, or any other forms of remuneration. Now, after centuries, it is time for Denmark to give back – world peace is at stake! China and Russia want Greenland, and there is not a thing that Denmark can do about it.”

He signed off his Truth Social post: “The United States of America is immediately open to negotiation with Denmark and/or any of these Countries that have put so much at risk, despite all that we have done for them, including maximum protection, over so many decades. Thank you for your attention to this matter!”

But Lisa Nandy said she believes it is part of Trump’s diplomatic playbook.

She told the BBC’s Sunday With Laura Kuenssberg: “Often, with this particular US administration, the President will express a very strong view. He will then encourage a dialogue. He welcomes difference of opinion, and we will never shy away from standing up for what we believe is right, or asserting British interests. And what often happens is a negotiation.”

She rejected that Mr Trump would “chicken out”. “I don’t think he’ll chicken out. I think this is actually a really serious issue, and I think it deserves a far more adult debate than us threatening the United States and the United States threatening us.”

She said “the one thing that we won’t do is compromise on our position” that Greenland’s future is a matter for the people of Denmark and Greenland. “That is non negotiable. That is the starting point for the conversation.”

But Ms Nandy would not be drawn into how the Government could retaliate when asked about the possibility of the UK applying its own tariffs or delaying the King’s state visit to the US.

She said: “As the Prime Minister has very clearly said we disagree with this decision.

“We’re going to go and have that conversation with our American counterparts, and while we’re having that conversation with them, we’re also going to be talking about the security of the United Kingdom and the United States and how our interests are better served by working together.

“Our position on Greenland is non-negotiable, that we’ve made that very clear, and we’ll continue to make that clear.

“President Trump’s position on Greenland is different, notwithstanding that it is in our collective interest to work together and not to start a war of words.”