President Joe Biden will accept endorsements from at least 15 members of the Kennedy political family during a campaign stop Thursday in Philadelphia as he aims to undermine Donald Trump and marginalize the candidacy of independent Robert F. Kennedy Jr. Kerry Kennedy‚ a daughter of former Attorney General Robert F. Kennedy‚ niece of former President John F. Kennedy and sister of the current presidential candidate‚ will deliver the endorsements of Biden‚ according to the Biden campaign....