Kerry Kennedy, the younger sister of Robert F. Kennedy Jr., addressed a group of Biden supporters in Philadelphia, joined on stage by the president and other members of her family. “We want to make crystal clear our feeling that the best way forward for America is to reelect Joe Biden and Kamala Harris for four more years,” Kennedy said. Fifteen members of the Kennedy family were in attendance at the event. The endorsement did not come as a surprise, as Kerry Kennedy and other members of the fam