A day before the U.S. president was due to have bilateral talks with Theresa May, Trump used an interview with the Rupert Murdoch-owned Sun to endorse her principal Tory rival just days after he resigned from the cabinet in protest at her Brexit policy.
His visit coincides with "a pretty hot spot, with many resignations", he noted before take-off from Brussels for London on Thursday, referring to the political crisis over the Brexit white paper. Mr. Trump has been a keen supporter of Brexit and on Thursday he appeared to echo those concerns.
"He is destroying all the norms of what used to be a great democracy in America and so I'm really concerned about my country and I'm here now and so this is where I have the chance to protest him". "But maybe they're taking a little bit of a different route, so I don't know if that's what they voted for".
Trump has always been a Brexit supporter and has expressed enthusiasm for a wide-ranging trade deal with Britain after Brexit, something heralded by eurosceptics as being one of the great benefits of exiting the bloc.
May is trying to unify her deeply divided Conservative Party behind her Brexit plans with some of her own lawmakers openly speaking of a leadership challenge.
The US Embassy has warned American citizens to keep a low profile during the visit in case protests turn violent.
Tomorrow, May and Trump will visit an unnamed defence site to view a demonstration of UK military capabilities, as a showcase of integrated UK-US military training. Around 50 percent think the visit should go ahead, compared with 37 percent who think the visit should be canceled.
The organisers behind the blimp however, said they were just "poking fun" and "hope Trump sees it". Having to play nice with the person you don't have very much in common with, because it's the right thing to do.
Protesters against the visit of US President Donald Trump gather with placards at a barrier set up to block access to the US ambassador's residence Winfield House in Regents Park in London.
Germany ‘totally controlled by Russia,’ Trump tells North Atlantic Treaty Organisation chief
Whereas the United States in actual numbers is paying 4.2% of a much larger GDP. In May, Tusk said that with friends like Trump, one doesn't need enemies.
They said that the performers will also be marching with a fetish group, as Fetish Week London is running from July 8 to 15.
The president wore a black tuxedo for the occasion as he escorted his wife from the USA ambassador's London residence in Regent's Park to the awaiting helicopter Marine One.
The American president reveals in an interview with The Sun newspaper that he has been told about a 20-foot "Trump baby" balloon that will be flown above Parliament Square on Friday as protesters march.
On Saturday, Trump supporters will rally near the USA embassy in Nine Elms, south London, for an event titled "Welcoming Trump to Britain Rally - Make Britain Great Again", at which a number of right-wing figures are scheduled to speak.
Later in the day, Mr Trump will travel to Blenheim Palace, the 18th-century stately home where Britain's World War II leader Winston Churchill was born and spent most of his childhood.
The Trumps are joining Prime Minister May and other British business leaders at the black-tie dinner at the palace to kick off their visit to Britain.
The two leaders are also expected to discuss Russia, Brexit and Middle East.
He is due to leave on Sunday for talks in Helsinki the following day with Russian President Vladimir Putin, whose government May has accused of unleashing a lethal nerve agent in the city of Salisbury.