King Charles has made several visits to the Oval Office over the years. HUM Images/Universal Images Group via Getty Images ; Samir Hussein/WireImage King Charles III has met 10 US presidents, from Dwight Eisenhower to Donald Trump. Richard Nixon tried to set Charles up with his daughter Tricia, and he grew close to Nancy Reagan. On Monday, Charles visited Donald Trump during the first British state visit to the US since 2007. For decades, royal family members and US presidential families ha...