Donald Trump’s granddaughter, Kai, pays tribute to his viral ‘YMCA’ dance moves on TikTok. The 17-year-old recreates her grandpa’s trademark routine for The Village People’s hit song, writing in the caption, ‘Learned these moves from the best.’ Kai is the oldest of Donald Trump Jr. and Vanessa Haydon’s five children, and she’s the president-elect’s first grandchild. Her parents divorced in 2018.