King Charles and Queen Camilla have finished their historic visit to the United States to celebrate the country’s 250th birthday , and First Lady Melania Trump made sure to let Prince William and Princess Kate know she was thinking of them, too. President Trump and the First Lady paid a formal farewell to The King and Queen on April 30, with the two couples sharing warm wishes before Charles headed on to Bermuda and Camilla returned to the U.K. “Good luck with everything, and enjoy yourself,” the First Lady said, as lip reader Nicola Hickling told the Sun . “Send my love to Catherine and William and their children.” Article continues below Queen Camilla and Melania Trump are pictured on April 28. (Image credit: Getty Images) Melania has a particular fondness for the Princess of Wales, who she attended a U.K. scouting event with last September during the U.S. state visit to Britain .…