She fought what she called a battle with her blood and let the world in on the fight. Tatiana Schlossberg, John F. Kennedy's granddaughter. Her courage in the face of a rare form of Leukemia, and the legacy of public service and family tragedy she sadly now joins. Plus, previewing Zohran Mamdani's history-making inauguration, just after the ball drops tomorrow night, as New York's first Muslim Mayor, and one of the youngest ever to serve.