Michelle Obama and the Queen (Image: GETTY)
He told reporters after the UK visit: It s not just Congress. Even some foreign leaders, they have been looking ahead, anticipating my departure. Last week Prince George showed up to our meeting in his bathrobe. That was a slap in the face. A clear breach of protocol.
During the trip in April 2016, the Obamas also met then-Prime Minister David Cameron, who played golf with Barack, as they struck up another warm friendship.
Prince George meets Barack Obama (Image: GETTY)
Their friendship was well documented, with Mr Cameron persuading Barack to enter the Brexit debate as the country prepared to vote on its place in the EU.