All Your Red-Hot King Charles Portrait Questions, Answered

After taking three months off to receive treatment following his cancer diagnosis, King Charles has fully returned to public duties — i.e., finding new ways to snub Prince Harry and getting mixed up in other weird royal controversies.

The scandal du jour involves an incredibly red, six-foot-tall portrait of the monarch by U.K.-based artist Jonathan Yeo, which was unveiled at Buckingham Palace on Tuesday. The painting has proved divisive: Some called it refreshingly modern...