The US president met the Queen at Windsor Castle and, instead of the scheduled 30 minutes, the two - along with First Lady Melania - spent around 45 minutes together.
His four-day trip to Britain is not a state visit - with the formal trappings of a carriage procession and certain banquets - but it bears numerous hallmarks, including time with the head of state.
Trump has talked at length about the royal family over the years. "You get the word out, you can really protect yourself from the lies".
Then he and the Queen inspected the Guard of Honour, and Twitter users observed he seemed "classless", like he was "struggl [ing] to master the art of walking".
In a meeting like this, etiquette requires Trump to wait until the queen offers her hand, then to shake it politely and move on. Many assumed the Trumps kept her waiting, but they were on time.
Trump made a MAJOR faux pas. "The Queen is always in charge", Harrold explained. A handshake. This is not how one traditionally greets the Queen. Actually, that's just polite when interacting with any elderly woman, to be honest. "But I liked her a lot".
"She is a tremendous woman".
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US President Donald Trump said he intends to run for re-election in 2020 because "everybody wants me to" and there are no Democratic candidates who could defeat him. You don't see, like, anything embarrassing.
Donald Trump has described the Queen as an "incredible, sharp and beautiful" woman in an exclusive interview with ITV.
Trump gushed about how excited he was to meet the queen in an interview with The Sun beforehand.
Despite lauding the strength of the USA -U.K. "And the way she's conducted herself for so many years". "Putting his foot on British soil, it's Job 1, it's very important, very symbolic".
Queen Elizabeth, who served with the Auxiliary Territorial Service and trained as a driver and mechanic during the Second World War, was coronated all the way back in 1953, and is the longest-serving head of state in British history.
She and her husband, Prince Phillip, hosted Harry S. Truman for a formal dinner at the Canadian Embassy in Washington - in 1951.
While Melania was thrilled about meeting the Queen, many people blasted the American couple for allegedly behaving disrespectfully during the visit, suggesting the pair should have bowed and curtsied when they met Her Majesty.