Donald Trump makes a much delayed appearance in a state visit to the UK this week.
For three days, the US President is received by kings and politicians. He will also attend commemorations for the 75th anniversary of the D-Day landing.
But behind the pageantry hides a political difference that separates Britain and the United States.
State visits are primarily royal affairs, with a focus on both ceremony and politics. Nevertheless, the potential for slips is enormous.
Donald Trump made a mistake last year when he turned his back on the Queen and walked in front of her while inspecting the watch at Windsor Castle.
There will be a tricky moment this time as he makes a speech at the State Banquet at Buckingham Palace. Will he address the queen correctly? Recently, the White House falsely referred to it as "Your Royal Majesty." [Those who deal regularly with royalty would know that it should just be “Her Majesty”
Will Mr. Trump continue to speak during the national anthem as President Obama did in 2011?
If Mr. Trump drinks tea with the Prince of Wales at Clarence House, will they be able to express their rather different views on climate change?
The President has no incentive to mess things up – he clearly likes the splendor and splendor of the kings and wants the pictures to return home before his re-election. However, the question remains how much advice he will receive from his protocol team.
Theoretically, the main potential focus could be the Duchess of Sussex, who in her past lived in pre-royal life resisting Mr. Trump's views. The US president told The Sun newspaper he was surprised that Meghan was so "angry" about him.
Maybe the Duchess is still on maternity leave and will not play a role in the visit.
But it will not go unnoticed that an American citizen who has recently joined the British royal family and embodies the close relationship between the two countries will not be part of the team that welcomes their president on these shores.
Trump's visit is politically difficult for Great Britain. He will visit the lame Prime Minister of Ducks with Theresa May, who will step down as conservative head of government at the end of the week.
Britain is still gripped by the appalling hand of the Brexit debate. In his interview with Sun, the president criticized Ms. May for allowing the EU to "have all the cards" in the negotiations.
The question is whether he will support a Brexit in which Britain leaves the EU without a specific agreement.
Remember, when Mr. Trump paid a working visit to the UK last year, he upset Downing Street by criticizing Ms. May's Brexit policy.
What could he say about a post-Brexit US-UK trade deal he usually pays lip service to?
Mr. Trump has already expressed his support for Nigel Farage and states that the chairman of the newly formed Brexit Party is his friend, a "great power" in Britain and someone to whom he has great respect. Will Mr. Trump find time to meet Mr. Farage?
Downing Street has rejected the idea of an official meeting of the two. But could there be time for a quick cup of tea at Winfield House, the US Ambassador's London residence? No page excludes it.
A minister told me that this would be both disappointing and rude. But Mr. Trump rarely misses the opportunity to partner with like-minded politicians, let alone underline the growing success of his policies.
It will not matter to him that the two leading opposition parties – Jeremy Corbyn and Sir Vince Cable – have rejected their invitations to dine with him at the State Banquet.
Mr. Trump also arrives in the middle of the conservative leadership competition that will determine the next Prime Minister of the United Kingdom.
He has already supported a candidate, the leader Boris Johnson. The president told The Sun that the former foreign minister was an outstanding prime minister who would do "a very good job".
On the one hand, there will be some Conservative MPs and party members who are impressed with it and welcome the idea that a potential future Prime Minister already has good relations with a close ally.
On the other hand, there may be some MEPs who believe that unofficial approval by an unpopular US President, Mr. Johnson, does not endorse the broader British electorate, which has more mixed feelings about Mr. Trump.
Remember, Mr. Trump already supported Mr. Johnson when he was in the UK last year. Mr. Johnson – a former US citizen – would make "a great Prime Minister."
Equally interesting would be comments made by Mr Trump on the Labor leader, Mr Corbyn, who might someday be the person he meets for lunch at Downing Street, a leader who expresses his hostility to many US citizens. Politicians did not hide.
Trump told The Sun he was "not offended" when Corbyn refused to attend the state banquet and said, "He probably makes a mistake because I think he wants to get along with the United States."  Middle East
During a ceremonial visit and talks with a outgoing prime minister, there is the possibility to discuss a factual policy restricted.
On a journey to emphasize unity, however, there will be much to contradict.
Take, for example, the Middle East. The British and the US disagree on how best to change Iran's behavior. Britain continues to support the Agreement to Halt the Tehran Nuclear Program. The US is unwilling to sanction a British company or bank that deals with Iran.
The US has deployed a carrier strike unit and B52 bomber into the region. Some British diplomats fear that this could provoke an escalation, even a war.
Are these differences something that Mr. Trump wants to address in public?
- Are the United States heading for war with Iran?
- Trump: War would mean the end of Iran.
The President Will Also Bring His Counselor and Son-in-Law, Jared Kushner, It is expected that the so-called "US Deal of the Century" will soon be announced to try to resolve the conflict between Israel and the Palestinians.
The British Government is concerned about any attempt to establish a unilateral plan that eliminates the two-state solution and seeks to buy the Palestinians with hard money.
The Americans have already made it clear that they are prepared to move forward without European support, as long as they are supported by one or two Arab states.
Will a hard conversation on Downing Street be included in the following press conference?
Let's not forget China. The growing confrontation between the US and China worries British politicians not only because of the potential impact on global economic growth.
But there is also the not so small thing from Huawei. The US is already annoyed at the British ministers' decision to allow the Chinese telecom giant to build part of the UK 5G mobile network.
They fear that this could give the Chinese state access to British and American secrets through Huawei.
- Huawei: The Most Controversial Company in the World?
- Beijing defends Huawei in a 5G series
US officials warn that Trump will not only voice this during the state visit, but could even threaten to restrict the exchange of information with Britain as a result.
Just think what that might mean: The so-called "special relationship" has always had as its central core the exchange of information – a relationship between security experts that should be eternal, outside the gusts of political disagreement.
It would be difficult for the President to praise the relationship between Great Britain and the United States, while at the same time threatening to withhold secret services.
US officials say they are reassured that the British decision on Huawei is not final and remains in jeopardy until the election of a new prime minister. However, they can not rule strong words from their president on this issue.
Mr Trump, of course, once proposed that British intelligence agencies be involved in a plot against his election – something they publicly dismissed as ridiculous nonsense.