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Jack Schlossberg Says He May Never Process Sister Tatiana’s Death

His comments tie private loss to a pledge to pursue public service focused on cancer research.

Overview

  • In a new Vanity Fair interview, Jack Schlossberg says he does not think he will ever process the death of his sister Tatiana and that life changed when she was diagnosed two years ago.
  • He says her loss drives his run for New York’s 12th Congressional District and his push to fund cures for the cancer that took her life.
  • Schlossberg calls Tatiana his best friend and says she wanted him to win, vowing to honor that wish on the campaign trail.
  • Tatiana Schlossberg died on December 30, 2025 from acute myeloid leukemia, a disease she wrote about in The New Yorker after learning of it during her daughter’s birth in May 2024 and undergoing chemotherapy and a bone-marrow transplant before a relapse.
  • Her sister Rose matched for a stem cell transplant and the family helped raise Tatiana’s children during treatment, a caregiving role that now shapes how Jack explains his goals in public life.