It cited a former CIA analyst who accused UK agencies of helping the Obama Administration spy on Trump election campaign.
The president added: “WOW! It is now just a question of time before the truth comes out, and when it does, it will be a beauty!”
It may be he is hoping to ramp up tensions ahead of the visit in a bid to improve his leverage in any political discussions which may take place.
However, the accusation actually dates back to at least 2017 and has been denied by both the Obama administration and MI6.
A British security official was quoted by Reuters as saying the accusation was “totally untrue and quite frankly, absurd.”