"If signing up to the Trump worldview is the price of a deal, it's not worth paying", said one MP in May's party.
After criticizing its European allies at the North Atlantic Treaty Organisation summit, claiming that the U.S.is financing Europe's defense while Germany pays billons on Russian energy, his scheduled visit to London was remarked with protests and critics from activists and different politics groups.
Around a dozen children from a local school egged on Melania Trump and Philip May as they played lawn bowling, waving British and United States flags.
The US president attacked Sadiq Khan, the Greater London Authority, suggesting he was a "terrible mayor" who had "done a very bad job on terrorism" by allowing so many migrants to come to the city. I haven't been there in a long time.
'I guess when they put out blimps to make me feel unwelcome, no reason for me to go to London, ' he added.
'You have a mayor who has done a awful job in London. Look at what is going on in London, ' Trump said.
North Atlantic Treaty Organisation summit: Donald Trump says Germany is 'captive of Russians'
Trump did not stand in the way of NATO's adoption at the summit of new plans to defend against Russian Federation and terrorism. And you tell me if that's appropriate, because I think it's not.
The US leader also claimed that the PM ignored his advice on Brexit negotiations: "I would have done it much differently".
Trump walked ahead of the 92-year-old while inspecting troops and did not bow when he met her - a couple of minor protocol breaches - but the meeting went smoothly.
"To blame this on immigration from Africa is preposterous and we should call him out when he does so, " Khan, speaking on the BBC's Radio 4 Today programme on Friday morning, said. "He is thankful for the wonderful welcome from the prime minister here in the U.K". He is expected to hold a joint press conference with May after their meeting.
Trump had said that May's plan would "probably kill the deal" as it would mean the U.S. "would be dealing with the European Union" instead of the UK.
President Donald Trump took a break from his sparring with USA allies and the press on Friday to enjoy one of diplomacy's oldest traditions.
"Of course we should host and listen to and work with President Trump, but privileges have to be earnt".