Moments after the plane had taken off from Andrews military airport in Washington DC to take Keir Starmer and his entourage home, an emotionally drained but clearly happy prime minister walked down the aircraft for a mini victory lap for what he and his team considered to be a triumphant trip to the White House.
While he felt he had achieved as much as he could have hoped for on his foreign policy agenda, the real success for the prime minister though may have actually been in terms of domestic politics.