Biden left his sunglasses on when he met Queen Elizabeth II, but a former royal butler told Newsweek "he should have removed them."
Grant Harrold, a former butler to Prince Charles and Camilla, Duchess of Cornwall, told Newsweek the president was entitled to wear his shades to the event but should have removed them at the point he greeted Elizabeth.
Some one needs to train this slug, or train his handlers.
Joe Biden's protocol breach at Queen Elizabeth II meeting explained by royal expert
That's not a serious breech of protocol at all... The WH office of protocols has been really poor since Dubya was president. I have never seen such idiocy.