trump uk protests sot _00002809.jpg
trump uk protests sot _00002809.jpg
Now playing
01:24
Trump: 'I think they like me a lot in the UK'
WASHINGTON, DC - JULY 17:  U.S. President Donald Trump talks about his meeting with Russian President Vladimir Putin, during a meeting with House Republicans in the Cabinet Room of the White House on July 17, 2018 in Washington, DC. Following a diplomatic summit in Helsinki, Trump faced harsh criticism after a press conference with Putin where he would not say whether he believed Russia meddled with the 2016 presidential election. (Photo by Mark Wilson/Getty Images)
WASHINGTON, DC - JULY 17: U.S. President Donald Trump talks about his meeting with Russian President Vladimir Putin, during a meeting with House Republicans in the Cabinet Room of the White House on July 17, 2018 in Washington, DC. Following a diplomatic summit in Helsinki, Trump faced harsh criticism after a press conference with Putin where he would not say whether he believed Russia meddled with the 2016 presidential election. (Photo by Mark Wilson/Getty Images)
PHOTO: Mark Wilson/Getty Images North America/Getty Images
Now playing
02:18
Trump questions commitment to defend NATO allies
PHOTO: Shutterstock
Now playing
02:37
Montenegro residents laugh off Trump's remarks
National Security Advisor John Bolton listens as US President Donald Trump addresses the nation on the situation in Syria April 13, 2018 at the White House in Washington, DC. Trump said strikes on Syria are under way.  / AFP PHOTO / Mandel NGAN        (Photo credit should read MANDEL NGAN/AFP/Getty Images)
National Security Advisor John Bolton listens as US President Donald Trump addresses the nation on the situation in Syria April 13, 2018 at the White House in Washington, DC. Trump said strikes on Syria are under way. / AFP PHOTO / Mandel NGAN (Photo credit should read MANDEL NGAN/AFP/Getty Images)
PHOTO: MANDEL NGAN/AFP/Getty Images
Now playing
00:50
Bolton criticized Trump's NATO stance in 2016
Trump NATO
Trump NATO
PHOTO: POOL
Now playing
01:09
Trump: Alliance to NATO remains 'very strong'
US President Donald Trump gestures as he addresses a press conference on the second day of the North Atlantic Treaty Organization (NATO) summit in Brussels on July 12, 2018. (Photo by Brendan SMIALOWSKI / AFP)        (Photo credit should read BRENDAN SMIALOWSKI/AFP/Getty Images)
US President Donald Trump gestures as he addresses a press conference on the second day of the North Atlantic Treaty Organization (NATO) summit in Brussels on July 12, 2018. (Photo by Brendan SMIALOWSKI / AFP) (Photo credit should read BRENDAN SMIALOWSKI/AFP/Getty Images)
PHOTO: BRENDAN SMIALOWSKI/AFP/Getty Images
Now playing
00:52
Trump explains what he thinks of Putin
Trump NATO 2
Trump NATO 2
PHOTO: POOL
Now playing
00:25
Trump to reporter: I'm a very stable genius
U.S. President Donald Trump speaks during a press conference after a summit of heads of state and government at NATO headquarters in Brussels, Belgium, Thursday, July 12, 2018. NATO leaders gather in Brussels for a two-day summit. (AP Photo/Geert Vanden Wijngaert)
U.S. President Donald Trump speaks during a press conference after a summit of heads of state and government at NATO headquarters in Brussels, Belgium, Thursday, July 12, 2018. NATO leaders gather in Brussels for a two-day summit. (AP Photo/Geert Vanden Wijngaert)
PHOTO: Geert Vanden Wijngaert/AP
Now playing
03:41
Fact-checking Trump's NATO claims
NATO Secretary General Jens Stoltenberg (L), US President Donald Trump (R), NATO Assistant Secretary General for Political Affairs and Security Policy Alejandro Alvargonzalez (2L), NATO Spokesperson Oana Lungescu (3L) and White House Chief of Staff John Kelly (3R) and US Ambassador to NATO Kay Bailey Hutchison (2R) speak at a breakfast meeting at the US chief of mission
NATO Secretary General Jens Stoltenberg (L), US President Donald Trump (R), NATO Assistant Secretary General for Political Affairs and Security Policy Alejandro Alvargonzalez (2L), NATO Spokesperson Oana Lungescu (3L) and White House Chief of Staff John Kelly (3R) and US Ambassador to NATO Kay Bailey Hutchison (2R) speak at a breakfast meeting at the US chief of mission's residence in Brussels on July 11, 2018, ahead of a NATO (North Atlantic Treaty Organization) summit. Brendan Smialowski/AFP/Getty Images
PHOTO: Brendan Smialowski/AFP/Getty Images
Now playing
01:49
Trump's NATO comment made his own staff squirm
PHOTO: CNN
Now playing
01:00
NATO secretary general: We have to invest more
PHOTO: POOL
Now playing
01:30
Trump: Germany held captive by Russia
ZAGAN, POLAND - JUNE 18:  A soldier of the Polish Army mans a tank as a NATO flag flies behind during the NATO Noble Jump military exercises of the VJTF forces on June 18, 2015 in Zagan, Poland. The VJTF, the Very High Readiness Joint Task Force, is NATO
ZAGAN, POLAND - JUNE 18: A soldier of the Polish Army mans a tank as a NATO flag flies behind during the NATO Noble Jump military exercises of the VJTF forces on June 18, 2015 in Zagan, Poland. The VJTF, the Very High Readiness Joint Task Force, is NATO's response to Russia's annexation of Crimea and the conflict in eastern Ukraine. Troops from Germany, Norway, Belgium, Poland, Czech Republic, Lithuania and Holland were among those taking part today. (Photo by Sean Gallup/Getty Images)
PHOTO: Sean Gallup/Getty Images Europe/Getty Images
Now playing
01:23
What's the point of NATO?
PHOTO: CNN
Now playing
02:20
NATO ambassador: Discord music to Putin's ears
US President Donald Trump speaks during a meeting with NATO Secretary General Jens Stoltenberg in the Oval Office of the White House in Washington, DC, May 17, 2018. (Photo by SAUL LOEB / AFP)        (Photo credit should read SAUL LOEB/AFP/Getty Images)
US President Donald Trump speaks during a meeting with NATO Secretary General Jens Stoltenberg in the Oval Office of the White House in Washington, DC, May 17, 2018. (Photo by SAUL LOEB / AFP) (Photo credit should read SAUL LOEB/AFP/Getty Images)
PHOTO: SAUL LOEB/AFP/Getty Images
Now playing
02:41
Trump blasts NATO allies ahead of summit
NATO flag flying at NATO Headquarters Brussels.
NATO flag flying at NATO Headquarters Brussels.
PHOTO: From NATO/From NATO/From NATO
Now playing
02:23
What Trump says about NATO and what it actually does
(CNN) —  

US President Donald Trump arrived for a controversial two-day visit to the United Kingdom on Thursday, declaring he was popular with Britons because of his hardline stance on immigration and questioning Prime Minister Theresa May’s Brexit strategy.

Shortly before leaving a turbulent NATO summit in Brussels, Belgium, Trump said the British people shared his concerns on immigration, claiming “that’s why Brexit happened.”

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.”

“She should negotiate the best way she knows how, but it’s too bad what’s going on,” the President said.

Trump told The Sun he felt her approach of keeping some ties to the EU would “affect trade with the United States, unfortunately in a negative way.”

He told the newspaper he felt the UK was “losing its culture” because of immigration.

His comments were a signal that his trip to the UK – billed as a “working” visit but laced with a degree of pomp and ceremony – would be eventful. He is due to hold talks with May and take tea with Queen Elizabeth II. His schedule has been carefully designed to avoid planned protests, including the flying of a giant “baby Trump” balloon.

Donald Trump and first lady Melania Trump step off Air Force One as they arrive at London
Donald Trump and first lady Melania Trump step off Air Force One as they arrive at London's Stansted airport.
PHOTO: Pablo Martinez Monsivais/AP

Trump arrived at Stansted Airport, north of London, early Thursday afternoon. He was flown by helicopter to the residence of the US ambassador to the UK at Regent’s Park, central London, where a large steel security fence has been erected.

Trump is spending the night there after a black-tie dinner at Blenheim Palace, the birthplace of one of his heroes, Winston Churchill.

Speaking at the dinner, May repeated her desire to conclude a post-Brexit trade deal with the United States.

“As we prepare to leave the European Union, we have an unprecedented opportunity to do more. It’s an opportunity to reach a free trade agreement that creates jobs and growth here in the UK and right across the United States,” she said, in remarks released by Downing Street.

“It’s also an opportunity to tear down the bureaucratic barriers that frustrate business leaders on both sides of the Atlantic.” She mentioned thousands of US companies having offices in the UK. “And the strength and breadth of Britain’s contribution to the US economy cannot be understated. The UK is the largest investor in the US, providing nearly a fifth of all foreign investment in your country,” she said.

UK Prime Minister Theresa May,  US President Donald Trump and his wife Melania arrived at the black-tie dinner at Blenheim Palace on Thursday evening.
UK Prime Minister Theresa May, US President Donald Trump and his wife Melania arrived at the black-tie dinner at Blenheim Palace on Thursday evening.
PHOTO: BEN STANSALL/AFP/Getty Images

Security is tight for Trump’s visit. London’s Metropolitan Police department has drafted in reinforcements from almost every police force in the UK, Home Office Minister Nick Hurt told Parliament on Thursday. He said it was a “significant” policing operation but that the right to protest was “a fundamental one and needs to be respected.”

Asked whether he was concerned about protests during his visit, Trump told reporters in Brussels: “I think they like me in the UK. I think they agree with me on immigration.” He reminded reporters that his mother was from Scotland, which he plans to visit at the weekend.

On Thursday evening, hundreds of demonstrators gathered in Regent’s Park in protest. The protesters blared bells and whistles, chanting “Stay out, stay clear, Donald Trump get out of here” and booed as the US President left for Blenheim Palace in a helicopter with his wife.

FOLLOW LIVE: President Trump’s visit to the UK

Trump also issued a warning to the European Union, telling it to “be very careful” of increasing immigration into the region, as he described a global backlash to migration.

“I … partially won an election because of immigration,” he said, also pointing to Italy’s recent vote, in which Giuseppe Conte took leadership of the government after campaigning on a populist anti-immigration platform.

Trump weighed in on British political affairs. “I’m going to a pretty hot spot right now, right? With a lot of resignations,” he said, in a reference to recent turmoil in May’s government.

Asked for his views on Britain’s departure from the European Union, Trump said he did not wish to be seen as interfering in UK politics. But he said: “I would say Brexit is Brexit,” echoing the “Brexit means Brexit” phrase often used by May.

“The people voted to break it up so I imagine that is what they would do, but maybe they’re taking a different route,” he added, apparently referring to the UK government’s recent decision to pursue a closer relationship with the European Union after Brexit. “I’m not sure that’s what they voted for,” Trump said.

In other remarks to The Sun, Trump said former Foreign Secretary Boris Johnson would make a great prime minister. “I think he’s got what it takes, and I think he’s got the right attitude to be a great prime minister.”

MORE: Donald Trump brings own wall of steel on UK visit as protesters gather

Trump postponed his trip to the UK several times as a petition to block him from entering the country gained so many signatures it was debated in Parliament. The Parliament speaker made clear that Trump would not be invited to address MPs.

The petition against Trump said an official state visit would be embarrassing for the Queen.

He again postponed his visit in January this year after remarking that the relocation of the US Embassy in London was a “bad deal” made by President Obama, and that he was not interested in cutting the ribbon at the opening.

CNN’s Kara Fox contributed to this report.