An unprecedented second state visit to Britain by U.S. President Donald Trump was due to get underway when he and First Lady Melania Trump arrive later Tuesday.

If anyone can get the president's attention, King Charles and the Royal Family must be close to the top of the list.

With state banquets and country-house visits, U.S. President Donald Trump has a busy few days planned as he embarks on his second state visit to the U.K.