Looking ahead to his meeting with Russian president Vladimir Putin on Monday, Trump said he would be discussing many topics but his biggest hope was an agreement to substantially reduce nuclear proliferation - his ultimate dream was to get rid of the weapons altogether, he said.
But over on social media, it's also triggered a new meme, which involves a certain current British prime minister - who has been pictured looking positively smitten with her new guest.
But, as the two leaders stood together for a press conference in the garden of May's grand 16th-Century official residence Chequers, Trump said the British leader was doing a "fantastic job", added it was up to her how to conduct Brexit, and that a free trade deal was very much on the table.
"The communique is clear: it reaffirms the commitment to two per cent (of GDP)", said Macron, who was photographed smiling and sharing a hug with Trump yesterday despite recent tensions between the two.
"I think he has done a bad job on crime, if you look, all of the frightful 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 deal she is striking is a much different deal than the one the people voted on", he said. "I think he's got what it takes".
"I also represent a lot of people in Europe because a lot of people from Europe are in the United States", he said.
President Donald Trump once again falsely claimed he "predicted" Brexit.
"If you reported them that's good", Mr Trump told the political correspondent.
Instead, a series of events - a black-tie dinner with business leaders, a meeting with Prime Minister Theresa May and an audience with Queen Elizabeth II - will happen outside the bustling city, where Mayor Sadiq Khan has been in a verbal battle with Trump.
Speaking to TIME about Trump's comments at the launch of the blimp on Friday morning, one of the activists responsible said: "Great".
Trump, earlier this week, suggested that his meeting with Putin could be the "easiest" stop on his European tour.
Painting a rosy portrait before he left Brussels, Trump added: "I can you tell you that North Atlantic Treaty Organisation now is a really a fine-tuned machine".
"I said Brexit will happen and it did happen", he added. "I think it is important for him to see it.it will show the people that he is prejudiced against that we are behind them".
The Huffington Post headline highlighted the president's remarks on immigration and terror attacks, saying: "Trump storms United Kingdom: blasts May, goes full racist".
Under fire for his warm embrace of Russia's Vladimir Putin, Trump turned a harsh spotlight on Germany's own ties to Russian Federation, declaring Wednesday that a natural gas pipeline venture with Moscow has left Angela Merkel's government "totally controlled" and "captive" to Russian Federation.
Mr Trump has long complained that European countries do not spend enough on their own defence, leaving the USA to shoulder an unfair burden for protecting the continent.
The British government on Thursday published its long-awaited Brexit blueprint aimed at restarting stalled talks with the European Union, only for it to be panned by eurosceptics, the City of London and the U.S. president.