The grandson of former President John F. Kennedy on Friday ripped his cousin Robert F. Kennedy Jr.’s 2024 White House bid and threw his support behind President Joe Biden, The Hill reported. “President John F. Kennedy is my grandfather. And his legacy is important,” Jack Schlossberg, the 30-year-old son of US Ambassador to Australia Caroline Kennedy, said in a video he posted to his Instagram account. “It’s about a lot more than Camelot and conspiracy theories. It’s about public service and courage,” Schlossberg continued. He endorsed Biden’s reelection campaign and said Biden “shares my grandfather’s vision for America: That we...