The crowd is full of whistles, drums and the all-important pots and pans that seem to have become a symbol of this movement.
Whilst the mood is jovial, their motivation is serious. Most of those I’ve talked to are here because of Mr. Trump’s immigration policies, especially after recent pictures from the Mexican border.
There are also countless signs on his attitude toward women.
Mr. Trump arrived at the prime minister’s Buckinghamshire residence by helicopter after visiting the Royal Military Academy at Sandhurst, Berkshire, on Friday morning.
Meanwhile, First Lady Melania Trump played bowls with the PM’s husband, Philip May, at the Royal Hospital Chelsea in London. She met Chelsea Pensioners and local children.
In his Sun interview, Mr. Trump – who has been a long-time supporter of Brexit – said Mrs. May had not listened to his advice on how to do a Brexit deal, saying: “I would have done it much differently.”
Mr. Trump also told the paper that former Foreign Secretary Boris Johnson – who disagrees with the PM on Brexit and resigned this week – would make a “great prime minister”, adding: “I think he’s got what it takes.”
But at the Chequers news conference, Mr. Trump said he had been responding to the Sun’s question about Mr. Johnson as a possible prime minister, adding: “He has been very nice to me. He’s been saying very good things about me as president”.
In the Sun, Mr Trump also renewed his criticism of London Mayor Sadiq Khan over last year’s terror attacks in London, saying he had done “a terrible job”.
After it was published, White House spokeswoman Sarah Sanders said the president “likes and respects Prime Minister May very much”, adding that he had “never said anything bad about her”.
Mayor of London Sadiq Khan defended his decision to allow the giant Trump baby inflatable to fly and on the president’s criticism of his response to terrorism said it was “interesting” that the mayors of other cities which have experienced attacks were not mentioned.
Tom Newton Dunn, the Sun’s political editor who interviewed Mr. Trump, said the US president seemed “sensitive” and knew about the “Trump baby”.
“He’s really quite stung by the criticism he’s been getting,” said Mr. Newton Dunn. “He knew all about the baby blimp. I think it hurt him.”
Meanwhile, shadow foreign secretary Emily Thornberry said the PM “should be standing up to Mr. Trump” after he “slagged her off”, instead of holding his hand.
Extra security is in place to police protests planned for the second day of Mr Trump’s visit.
Source: Jennifer Scott, BBC News