Some of their signs read "Dump Trump", "Lock Him Up" and "There Will Be Hell Toupee".
"I never said anything bad about her".
"Our trade and investment relationship is unrivalled - we are the largest investors in each other's economies and every day a million British people go to work for USA companies in the United Kingdom and a million Americans go to work for United Kingdom companies in the US".
She pressed Trump about the deal on Thursday at a gala dinner at Blenheim Palace, the birthplace of Britain's World War II leader Winston Churchill. Anti-Trump protesters lined the road up to the building, but it is unlikely the Trumps - who arrived via helicopter - saw them.
She could say that "he and I do disagree on some things: his tearing of babies from their parents, his racist attacks on the London mayor, his lies, his admiration for dictators, and I tend to think his combover is an absurdity". I get along with her very nicely.
She continued: "This week we have an opportunity to deepen this unique trading relationship and begin discussions about how we will forge a strengthened, ambitious and future-proof trade partnership".
He is due to stay overnight with Johnson at the ambassador's Winfield House residence in London's Regent's Park where a protest is planned at which demonstrators will play recordings of migrant children held in United States detention centres.
Demonstrators lined the streets outside Blenheim Palace in Oxfordshire where the President and First Lady attended the black-tie dinner.
Trump told the tabloid The Sun that May "didn't listen" to his views on how she should negotiate the UK's exit from the European Union, but said that was "fine". "But maybe they're taking a little bit of a different route, so I don't know if that's what they voted for".
Donald Trump Meets The Queen For Tea During UK Visit
HRH has met with every sitting president since ascending to the throne in 1952, with the exception of Lyndon Johnson. The President wore a suit and tie and the first lady wore a pale pink suit with a skirt and black belt.
Gareth Southgate agrees with decision not to hold England parade
We saw it the other night against England , where Modric was still running the game late on and showing little signs of fatigue. That was just extra motivation for us. "The reality is that none of us know if that's as good as it gets", Southgate answered.
Jose Mourinho reiterates admiration of Ivan Perisic following World Cup semi-final
I don't want it to happen again. "We can not sneeze at that". "This brought me huge experience ... and I built a name for myself". After Horacio Elizondo in 2006, he becomes the second Argentinian referee to officiate a World Cup Final.
But standing beside her on Friday, Trump seemed to go out of his way to lavish praise on the British leader, offering a rare apology and saying, "This incredible woman right here is doing a fantastic job". Trump is arriving following a chaotic North Atlantic Treaty Organisation summit. "They are just a lobbyist for Amazon", he said.
While she hopes the Trump visit will focus on trade and strengthening security ties, it is likely to be heavy on rhetoric about the transatlantic "special relationship" and short on specifics such as any details of a post-Brexit trade deal.
"Whatever you do is OK with us, just make sure we can trade together, that's all that matters".
As he began a four-day visit to Britain on Thursday, Trump, a major supporter of Brexit, told The Sun that he had advised May to go about leaving the European Union in a different way but was ignored.
Late previous year, Ms May herself criticised Mr Trump for retweeting a message by a member of a British far-right group, and the speaker of parliament has said the president would not be welcome to address the chamber. "I think he's got what it takes, and I think he's got the right attitude to be a great prime minister".
On Friday night he flew on Air Force One to Glasgow Prestwick Airport in Scotland for a two-day private stay at his famous Turnberry golf resort but protests are expected to continue on Saturday.
"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".
The two leaders will hold talks the following day at Chequers, the 16th-century manor house which is the prime minister's official country residence.