US President Donald Trump called London Mayor Sadiq Khan a "stone cold loser", who has repeatedly criticized the American leader.

"Sadiq Khan, who by all accounts has done a terrible job as Mayor of London, has been foolishly “nasty” to the visiting President of the United States, by far the most important ally of the United Kingdom. He is a stone cold loser who should focus on crime in London, not me......” Trump wrote on his Twitter page.

Moreover, the US President reiterated that Khan reminds him very much of very dumb and incompetent Mayor of NYC, de Blasio, who has also done a terrible job - only half his height. “In any event, I look forward to being a great friend to the United Kingdom, and am looking very much forward to my visit. Landing now!” the US President wrote.