Jack Schlossberg is opening up about the last thing his older sister, Tatiana Schlossberg, told him before her death.
During an interview with CBS News Sunday Morning on Sunday, Mar. 1, the The 33-year-old grandson of former President John F. Kennedy said his sister's last words to him were in support of his ongoing congressional campaign.
Schlossberg is currently running to represent New York's 12th Congressional District in the U.S. House of Representatives following the retirement of longtime Democratic Congressman Jerrold Nadler.
When Jack was asked what Tatiana thought about his candidacy, he said, “I can tell you now that she’s still rooting for us.”
“The last thing that she said to me was, ‘You better win,’” Jack continued. "No one knew me better, and I knew no one better than her."
RELATED: John F. Kennedy’s Granddaughter Tatiana Schlossberg Dead at 35
The 35-year-old environmental journalist passed away on Dec. 30 following a year-and-a-half battle with acute myeloid leukemia (AML).
“Our beautiful Tatiana passed away this morning. She will always be in our hearts,” read a post shared by the JFK Library Foundation on Dec. 30, which was signed by “George, Edwin and Josephine Moran, Ed, Caroline, Jack, Rose and Rory.”
Tatiana first revealed her diagnosis in an emotional essay published in The New Yorker in November 2025.
At the time, Schlossberg shared that doctors discovered her cancer shortly after the birth of her second child in May 2024.
“I did not — could not — believe that they were talking about me,” she wrote in the essay. “I had swum a mile in the pool the day before, nine months pregnant. I wasn’t sick. I didn’t feel sick. I was actually one of the healthiest people I knew.”
Schlossberg’s treatment included a bone marrow transplant, chemotherapy, and a clinical trial for CAR-T cell therapy. However, despite a year-and-a-half of treatment and going into remission several times, Schlossberg was told in 2025 that she likely had a year left to live.
“My first thought was that my kids, whose faces live permanently on the inside of my eyelids, wouldn’t remember me,” she wrote.
Schlossberg is survived by her husband, George Moran, their 3-year-old son Edwin and 1-year-old daughter Josephine, her parents—Caroline Kennedy and Edwin Schlossberg, and her siblings Jack and Rose Schlossberg.
Jack paid tribute to his older sister in January by sharing 10 quotes from famous writers and public figures on Instagram—the first being an excerpt from Tatiana’s 2019 book, Inconspicuous Consumption: The Environmental Impact You Don’t Know You Have.
“It’s up to us to create a country that takes seriously its obligations to the planet, to each other, and to the people who will be born into a world that looks different than ours has for the last 10,000 years or so,” the quote read. “Essentially, what I’m describing is hard work with possibly limited success for the rest of your life. But we have to do it, and at least we will have the satisfaction of knowing we made things better. …Come on, it will be fun (?).”
also included a quote from Jack and Tatiana’s grandfather which read, “There are three things in life which are real: God, human folly and laughter. Since the first two are beyond our comprehension, we must do what we can with the third.”
The carousel ended with a photo of the siblings standing with their hands over their hearts at a January 2011 event at the U.S. Capitol. was captioned with a simple “?.”
RELATED: Tatiana Schlossberg Criticizes Cousin Robert F. Kennedy Jr. Amid Her Terminal Cancer Diagnosis
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