Watch: Jack Schlossberg Honors Late Sister Tatiana Schlossberg With Childhood PhotoJack Schlossberg is holding sister Tatiana Schlossberg's final words close to his heart. Months after Caroline Kennedy's youngest daughter died Dec. 30 following a battle with myeloid leukemia, the political commentator-who is running for congress-shared his sister's last words to him. "I can tell you now that she's still rooting for us," Jack told CBS News Sunday Morning Mar. 1 of his campaign efforts. "The last thing that she said to me was, 'You better win.'" "No one knew me better," he added, "and I knew no one better than her." Jack, 33, also touched on what it was like to grow up alongside Tatiana and their older sister Rose Schlossberg, who Caroline shares with husband Edwin Schlossberg. "It's brutal, absolutely brutal," he quipped of growing up with two older sisters. "They don't let you get away with anything. My style is never good enough. I've never gotten an answer right in my entire life."readA Kennedy Family Guide: Tatiana Schlossberg, Jack Schlossberg, Caroline Kennedy & More"But in all honestly, they taught me everything I know on how to be a strong person," he continued. "It's also made me more contentious and aware of my own privilege and position as a man in a world that often rewards certain types of behavior and certain people." He also shared how he's dedicated to being "the best" uncle to Tatiana's kids Edwin, 3, and Josephine, 15 months, whom she shared with husband George Moran. When asked if there's a fourth reason a baby might cry-aside from being "tired, hungry, or sick"-he joked, "or they miss Uncle Jack. A lot of people don't know about that one."Tom Williams/CQ-Roll Call, Inc via Getty Images, Photo by Craig Barritt/Getty Images for New York MagazinJack's comments come after his family shared the news of Tatiana's Dec. 30 death. She was 35. "Our beautiful Tatiana passed away this morning," the late environmental journalist's loved ones wrote in a statement. "She will always be in our hearts." Leading up to her tragic passing, Tatiana had opened up about how her family stood by her side as she battled the terminal prognosis. "My parents and my brother and sister, too, have been raising my children and sitting in my various hospital rooms almost every day for the last year and a half," Tatiana wrote in the Nov. 22 essay published in The New Yorker. "They have held my hand unflinchingly while I have suffered, trying not to show their pain and sadness in order to protect me from it. This has been a great gift, even though I feel their pain every day." For more on the Kennedy family, read on...

Everett/ShutterstockJoseph P. Kennedy and Rose KennedyJoseph Patrick "Joe" Kennedy married Rose Elizabeth Fitzgerald on Oct. 7, 1914.

Bachrach/Getty ImagesBy 1932, they had nine children together: Joseph P. Kennedy Jr., John F. Kennedy, Rosemary Kennedy, Kathleen Kennedy, Eunice Kennedy, Patricia Kennedy, Robert F. Kennedy, Jean Kennedy and Edward Kennedy.

Keystone-France/Gamma-Keystone via Getty ImagesJoseph P. Kennedy Jr.

Born July 25, 1915, Joe Jr. was going to be president, as far as his father was concerned. He was a delegate to the 1940 Democratic National Convention and planned to run for Congress after he got out of the Navy. But the 29-year-old and his co-pilot Wilford John Willy were killed Aug. 12, 1944, when explosives they were carrying detonated prematurely while on a bombing run that was part of Operation Aphrodite. Neither pilot's body was ever recovered and their names are among those on the Tablets of the Missing at the Cambridge American Cemetery and Memorial honoring casualties of World War II.

Mikki Ansin/Getty ImagesJohn F. KennedyIt was John, born May 29, 1917, who made it to Congress, then became a U.S. senator and ultimately was elected president in 1960. He married Jacqueline Bouvier on Sept. 12, 1953, and they welcomed daughter Caroline Kennedy on Nov. 27, 1957, and son John F. Kennedy Jr. on Nov. 25, 1960. A daughter, Arabella, was stillborn in 1956 and son Patrick, born prematurely on Aug. 7, 1963, lived for only 39 hours. JFK was assassinated on Nov. 22, 1963, one of the defining events of the 20th century.

Tatiana, Jack, Rose, Edwin, Caroline (Clodagh Kilcoyne/Getty Images)Caroline KennedyCaroline, the U.S. ambassador to Japan during the Obama administration and to Australia for the Biden administration, married Edwin "Ed" Schlossberg in 1986. They share daughters Rose Kennedy Schlossberg (born June 25, 1988) and Tatiana Kennedy Schlossberg (May 5, 1990) and son John "Jack" Bouvier Kennedy Schlossberg (Jan. 19, 1993). TV producer Rose went to Harvard like her mom and married restaurateur Rory McAuliffe in 2022. Tatiana-a journalist who didn't know at the time that her 2014 New York Times article about a dead bear being found in Central Park involved her cousin RFK Jr.-graduated from Yale and married college sweetheart George Moran in 2017. They welcomed a son, Edwin Jr., in 2022, and a d