The wheels of Air Force One hadn’t even touched the ground at Stansted when Donald Trump announced his connection to the UK’s mobile network by... you guessed it, slagging off Sadiq Khan.
Not content with comments he made last night about the London Mayor, the president repeated them and for good measure called him a “stone cold loser” as well.
In two tweets, he wrote: “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......”
He added: “Kahn reminds me very much of our 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!”
Khan’s spokesman responded by saying “childish insults” should be “beneath the president of the United States”.
They added: “Sadiq is representing the progressive values of London and our country, warning that Donald Trump is the most egregious example of a growing far-right threat around the globe, which is putting at risk the basic values that have defined our liberal democracies for more than 70 years.”
Later on Monday afternoon, New York Mayor Bill de Blasio came out in support of Khan.
And who came out of Trump’s side? Why, it’s Mr Piers Morgan of course.
On Sunday Khan stoked the ire of the president by describing him as “just one of the most egregious examples of a growing global threat” and compared the language he has used to that of the “fascists of the 20th century”.
As he left the White House on that evening, Trump rebuked the Mayor saying he would not be willing to meet him.
Raising the stakes even further, Trump praised Boris Johnson and Nigel Farage, talked up the prospect of a Brexit trade deal, rebuked and denied making “bad” comments about the Duchess of Sussex as he set off for Britain – even though he’s on tape making them.
The US president said he expected his three-day state visit to be “very important” and “very interesting” as he left the White House.
Today’s itinerary includes a ceremonial welcome at Buckingham Palace at noon followed by a visit to the Royal Collection and then an event at Westminster Abbey 1510.
Later the presidential couple will have tea with the Prince of Wales and Duchess of Cornwall, followed by a state banquet this evening.