In an unprecedented rebuke amid warnings Nato was 'heading for disaster', the PM told the US President his proposal to impose tariffs on those willing to defend Greenland was 'wrong'.
If economic sanctions are designed to apply pressure without firing a shot, then U.S. President Donald Trump has aimed at America's closest military allies.
European leaders are set to gather in person in the coming days to discuss how to respond to the U.S. president's move to slap tariffs on countries that don't back his plans to take over Greenland.