The US President, 72, dismissed “short” Khan as a “sore loser” just before jetting off for his first official state visit – and again minutes before he touched down in Britain.
Sparking a furious war of words between the two men, the US President began tweeting insults at Mr Khan just before he landed on British soil around 9am.
He landed at Stansted this morning for a three-day trip, having already humiliated outgoing PM Theresa May over Brexit.
The President called the London Mayor a “stone cold loser” and urging him to “focus on crime in London, not me”.
Watch video below ? ? ?