But she also warned Trump not to ignore the "malign behaviour" of Moscow when he meets Russian President Vladimir Putin in Helsinki next week. A weak prime minister (who is far closer to the Daily Mail) and Brexit in jeopardy, present the ideal opportunity to display power and buy up or unearth more news stories.
"Once we have our agreement with the European Union in place, I'm confident that there will be the latitude and the ability to do a significant trade deal with the United States".
"I would have done it much differently", Trump said.
"She should negotiate the best way she knows how".
Kevin Lamarque / Reuters British Prime Minister Theresa May and her husband Philip stand together with U.S. President Donald Trump and first Lady Melania Trump at the entrance to Blenheim Palace, where they are attending a dinner with specially invited guests and business leaders, near Oxford, Britain on July 12, 2018. We follow the day's events in pictures.
Mr Trump was not partial to the characterisation of himself as a balloon, saying: "I guess when they put out blimps to make me feel unwelcome, no reason for me to go to London".
Just two days before Trump's arrival, a dozen organizers and members of parliament accused the British police of "curtailing the right to protest and putting the health and safety of demonstrators in jeopardy" by denying groups permission to set up a stage and sound system at the main protest assembly point in London, the Common Dreams website reported. There, he'll meet with Prime Minister Theresa May and later, Queen Elizabeth II.
The interview was the latest breach of diplomatic protocol from Trump, whose predecessors tended to avoid criticizing their foreign hosts. A spokesperson for Downing Street told i the First Lady will be spending time with veterans and school children at a location in London on Friday morning, although they could not comment on where this visit would take place. "I think he's got what it takes". "But it is too bad what is going on", the president said.
"I shouldn't be the arbiter, as a politician, of what's in good taste or bad taste, what's important is it to be peaceful, and for it to be safe", he said.
Opponents to the controversial United States leader have threatened mass protests but Mr Trump is expected to avoid areas such as central London where demonstrators are likely to gather.
In the interview, Mr Trump said the United Kingdom would "probably not" get a trade deal with the USA if Prime Minister Theresa May's current Brexit plan went ahead.
"I think he has done a bad job on crime, if you look, all of the terrible things going on there, with all of the crime that is being brought in", Trump said, later adding that he thinks Khan has insulted him by not being "hospitable to a government that is very important".
The comments, made in an interview with tabloid newspaper The Sun, were published Thursday night, just as Trump and May were wrapping up dinner after a red-carpet reception at Blenheim Palace, Oxfordshire.
As you'd imagine, his appearance has attracted a fair bit of attention, prompting (among many things) a giant 20ft baby blimp to be floated above Parliament Square as part of a huge protest.