Biden, Worried About RFK Jr., Turns to the Kennedy Family for Help

The elaborate rollout of a Kennedy family endorsement of President Biden on Thursday — talk-show interviews, a campaign event with the president, door-knocking by Kennedys across Philadelphia — was the most powerful sign yet of rising concern in the Biden camp that Robert F. Kennedy Jr.’s independent White House bid presents a serious threat to the president’s re-election prospects.Members of this prominent Democratic family, including most of Mr. Kennedy’s siblings, had already signaled their support for Mr. Biden’s re-election. Mr. Kennedy’s estrangement from much of his…