'The people voted to break it up so I would imagine that's what they would do, but maybe they're taking a different route - I don't know if that is what they voted for'.
One such protest will entail a 19-foot-high orange balloon shaped like Trump as a baby, which London Mayor Sadiq Khan - who's feuded with the president - approved under "the right to peaceful protest".
Trump was flying over after a fraught North Atlantic Treaty Organisation summit in Brussels where he piled pressure on allies to double their defence spending. "I think that's why Brexit happened".
After spending the night at the USA ambassador's official residence in Regent's Park, London, Mr Trump will join the PM at a military base tomorrow to observe a joint counter-terrorism exercise involving United Kingdom and U.S. special forces.
This is when huge protests will be held across the city, with 50,000 people expected to turn up on Friday afternoon - parading to Trafalgar Square through central London.
Topics addressed by Trump in the two and a half minute time-frame include the many properties he owns in Ireland and Scotland, how he has nothing to say about Brexit, how he won the state of Wisconsin even though Ronald Reagan did not and finally, his sentiments about Ireland.
Ahead of Trump's arrival, the United States embassy advised USA citizens in London to "keep a low profile" during Trump's visit.
The baby blimp of President Trump is due to be flown over London this week. Vince Cable, the leader of the pro-EU Liberal Democrats, said, "Most of us don't think he is particularly good judge on Brexit or anything else". "Obviously demonstrations are one of the most visible ones, but there's also the potential opportuning and exploitation of the visit by those with more nefarious intentions".
Donald Trump and wife Melania have been pictured dressed up to the nines at a lavish dinner at Blenheim Palace, hosted by Theresa May. After arriving in Great Britain Thursday evening, Trump and the first lady will dine with May and her husband at Blenheim Palace.
When asked about the threat of mass demonstrations he said: "I think it's fine".
The pair will then travel to Chequers - the PM's country residence in Buckinghamshire - for talks with the foreign secretary.
May was the first head of government to officially meet Trump as president, in January 2017.
"It's important for us to send a powerful signal to those who are resisting and campaigning in America that we are standing in solidarity with them", Rehman said.
Mr Trump had joked earlier this week that his meeting with Vladimir Putin in the Finnish capital Helsinki on Monday "may be the easiest" part of his European trip.
Later, Trump will take tea with Queen Elizabeth II at Windsor Castle, a home to the royals for 1,000 years, part of a tour created to keep him away from protesters.