Prime Minister Keir Starmer has delivered a stark rebuke to US President Donald Trump, branding his threat to impose tariffs on NATO allies as "wrong". The confrontation came during a tense phone call on Sunday evening, following President Trump's warnings over his ambitions to acquire Greenland.
Emergency Response to Trump's Tariff Ultimatum
The diplomatic crisis prompted an immediate reshuffle of the Prime Minister's schedule. Keir Starmer ripped up plans for a domestic cost-of-living speech in the North West on Monday, 19th January 2026, to instead hold an emergency Downing Street press conference at approximately 9.15am. The move underscores the severity with which the UK government views the potential economic and security fallout.
President Trump's threats emerged from what has been described as his "Greenland tantrum". The erratic US leader warned he would impose 10% tariffs on countries, including the UK, for opposing his desired takeover of the autonomous Danish territory. He further escalated the situation by threatening to increase these levies on NATO allies to a staggering 25% by 1st June 2026 if a deal to purchase Greenland is not secured by that date.
A United Front from London and Allies
In his series of urgent calls on Sunday, Prime Minister Starmer coordinated a response with key international figures. He spoke with Danish Prime Minister Mette Frederiksen, European Commission President Ursula von der Leyen, and NATO Secretary-General Mark Rutte before his direct conversation with President Trump.
A Downing Street spokeswoman outlined the Prime Minister's consistent message: "He said that security in the High North is a priority for all NATO allies in order to protect Euro-Atlantic interests. He also said that applying tariffs on allies for pursuing the collective security of NATO allies is wrong."
This stance was echoed in a powerful joint statement from the threatened nations over the weekend. The allies warned that the White House's actions risked precipitating a "dangerous downward spiral" in transatlantic relations. They vowed to "stand united and coordinated" in their response and expressed "full solidarity with the Kingdom of Denmark and the people of Greenland".
Protecting Security and Living Standards
During his press conference, Mr Starmer was expected to delineate the UK's approach to navigating this international storm. His dual focus is clear: to work closely with global partners while shielding British citizens from the repercussions. The Prime Minister aims to protect both the nation's security framework and the living standards of the public, which could be severely impacted by such punitive trade measures.
This episode marks one of the first major foreign policy tests for the Starmer government and represents a rare instance of direct, public criticism of the US President from a UK Prime Minister. The coming weeks will be critical as the 1st June deadline looms and NATO allies work to maintain a cohesive front against what they see as an unjustified and destabilising economic threat.
