The US ambassador to the UK has also commented on Mr Johnson this morning.
Woody Johnson has suggested Donald Trump is not likely to hold Mr Johnson’s comments that the US President was guilty of “stupefying ignorance” against him.
He predicted the two leaders would have a “sensational” relationship.
Speaking to BBC’s Radio 4 Today programme, he said: “I think both of these leaders have their own style but they have similarities. And I think they have a clear vision of what they want to accomplish.”
He was asked whether Mr Trump was aware that the prime minister accused then-candidate Mr Trump of “stupefying ignorance” and being unfit to hold office.
“I’m sure he does,” the ambassador said.
“I think that may have been an odd comment at the time.
“Donald Trump is going to say what he wants to say, when he wants to say it, and he will comment on injustices or inabilities or how he sees it, and I think he respects Boris for the same. Boris is going to call it as he sees it.
“I think they have so much more in common in terms of what they want to accomplish for the good of both of our nations.”