Many assumed the Trumps kept her waiting, but they were on time.
The Queen and the President then inspected the Guard of Honour, with Mr Trump appearing to break protocol by walking ahead of the Queen - who usually keeps slightly ahead of her guest - as the 92-year-old walked cautiously on the grass. At exactly 12 p.m. ET, they exited their vehicle and began their official greeting with the queen, which means they were not late. Oh dear, she just looked at her watch.
The two heads of state inspected the guard before watching them march past, in the castle's quadrangle. You don't see, like, anything embarrassing.
He refused to specify what the advice was, but in an interview with The Daily Telegraph his former adviser, Steve Bannon, reveals that Trump told her to demand far more than she ever expected to get, and to maintain "momentum" because "if it drags out the deal doesn't get done".More news: Canada 'caught in the crossfire' of US-China trade dispute
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- US President Donald Trump on Friday played down his extraordinary attack on Britain's plans for Brexit, praising Prime Minister Theresa May and insisting bilateral relations "have never been stronger", even as tens of thousands protested in London against his visit. He shook her hand, but did not bow. "She has got a great and handsome grace about her".
His Scottish-born mother, Trump added, was also enamored with the British royalty. He admires Sir Winston Churchill and is a casual royal watcher, sometimes commenting on tabloid royal news on Twitter. Buckingham Palace said no other royals will be meeting him at Windsor. She smiled at the Trumps and chatted with them at some points.
Al Jazeera's Lee described Trump's interview as "absolutely incendiary".
While Trump typically likes to take the lead, he appeared to followed the queen's direction, adjusting his pace to hers.
Referring to the prime minister's most recent proposals which would keep a degree of alignment between United Kingdom and EU rules to smooth trade between the two partners, Trump said: "If they do a deal like that, we would be dealing with the European Union instead of dealing with the United Kingdom, so it will probably kill the deal". Audio of the interview was posted on The Sun's website shortly after, which made Trump's joint press conference with May even stranger.