Some signs at Thursday's protests condemned Trump's immigration policy, demonstrating the worldwide outrage he has drawn for separating families at the U.S. -Mexico border and imprisoning children and babies away from their parents.
Separately, Trump also dealt with the ongoing discussions with the European Union on the steel and aluminium tariffs, noting that "Both of my parents are from the European Union, despite the fact they don't treat us well on trade".
A Trump Baby balloon has been given permission to fly over central London during the USA president's visit to the United Kingdom after police in Scotland refused a request for the 6m (20ft) high balloon to also take to the skies over the golf course. Johnson, the president said, "would be a great prime minister".
There were also demonstrations close to Winfield House, the USA ambassador's residence near Regents Park where the president and first lady Melania Trump will spend the night. "I think it changed the fabric of Europe and, unless you act very quickly, it's never going to be what it was, and I don't mean that in a positive way". He added, however, that he thought the PM was a "very good person".
Criticising May for the warm welcome given to the American leader, he said: "Theresa May has invited President Trump to our country at a time when his unsafe and inhumane policies are putting the lives and wellbeing of millions of people at risk".
She listed Mr Trump's immigration policies, bans on some people entering the USA, his foreign policies, and lack of support for taking action on climate change as having affects across the globe.
Protesters also have plans to follow Trump to Scotland where they plan to fly the blimp near Turnberry while Trump is in town.
Mr Trump had accused Sadiq Khan of doing a "very bad job" of tackling terrorism and crime in the capital.
There is more to the 20-feet high balloon caricature - which depicts the leader as an angry infant wearing a nappy and clutching a mobile phone - than mockery, demonstrator Sheila Menon said.
"When a deal takes so long, they never work out very well", Trump said hours before meeting May for dinner.
Trump needs to reassure NATO that he’s not looking for a divorce
Trump (@realDonaldTrump) July 10, 2018NATO countries must pay MORE, the United States must pay LESS. At issue, the disparity in defense spending; Kevin Corke reports from Brussels, Belgium .
Prince William Caught by Kate Middleton Giggling at a Royal Event
The Duchess of Cambridge appeared to make a special gesture to involve her tragic mother-in-law in her grandson's christening. Guests were served slices of christening cake, which is a tier taken from The Duke and Duchess of Cambridge's wedding cake.
20,000 lose power in Puerto Rico storm
Many North Carolina beaches were closed due to heavy surf and unsafe currents caused by the storm, the governor's office said. Chris is expected to begin moving late Tuesday to the northeast and pick up speed Wednesday and Thursday, the center said.
As Trump is expected to discuss a possible post-Brexit trade deal and other global issues with May, organizers of Friday's demonstrations say there is no shortage of issues that will inspire mass numbers of people to attend. "They like me a lot in the UK".
The convention-shredding president had ignored diplomatic niceties ahead of touching down for the four-day visit - his first to Britain since taking power - by rebuking his beleaguered host as she struggles over Brexit.
Trump had earlier shrugged off the organised demonstrations, which on Friday will include a giant baby-shaped balloon bearing Trump's features and have required police to be mobilised from across the country.
For supporters, Trump and Brexit offer the prospect of breaking free from what they see as obsolete institutions and rules.
"But instead the Tories are rewarding President Trump with a red carpet welcome".
President Donald Trump has said British Prime Minister Theresa May's proposed Brexit plan will "probably kill" off any chance of a UK-US trade deal.
While the many thousands are expected to line the streets and protest against Trump, politicians have become involved too.
She added it was "also an opportunity to tear down the bureaucratic barriers that frustrate business leaders on both sides of the Atlantic".
Trump and May are set to meet again on Friday, and will hold a joint press conference.
He will spend the weekend with wife Melania in Scotland, where he owns two luxury golf courses.