I would really like people to stop posting images of my kid everywhere,” the singer, who shares two other children with the billionaire, said in an interview.

The tech billionaire and efficiency tsar took the highly unorthodox move of bringing his four-year-old X Æ A-Xii along for the ride. And “little X”, sitting aloft his father’s shoulders, told Donald Trump what many have wished to say to the US president: “Shush.”