President Donald Trump's 18-year-old granddaughter Kai Trump shared her school spirit in a lavish way. Kai - whose parents are Donald Trump Jr. and his ex-wife Vanessa Trump - celebrated her impending enrollment at the University of Miami by filling her bedroom full of merch from the school for a series of Instagram photos on Tuesday, May 5. (Kai confirmed she gave a verbal commitment to join Miami's golf team in August 2024.