UK PM Starmer urged Trump to withdraw 10% tariff threat on allies, calling it unjust and damaging to NATO.

In private, Prime Minister Keir Starmer called former US President Donald Trump's threat of 10% tariffs on allies unfair and detrimental to NATO unity. The call took place on January 17, 2026, in response to Trump's more general threats of economic retaliation, including over Greenland, which Starmer denounced as ineffective. The discussion revealed growing concern among Western leaders regarding the destabilizing effect of Trump's trade rhetoric on transatlantic relations and collective security, even though no specifics were disclosed.