CNN — Robert F. Kennedy Jr., the anti-vaccine activist and environmental lawyer, will launch his bid for the 2024 Democratic presidential nomination on Wednesday in Boston. The 69-year-old Kennedy is the nephew of former President John F. Kennedy and son of former US attorney general and assassinated 1968 presidential candidate Robert Kennedy. He will join self-help guru Marianne Williamson in a presidential primary that President Joe Biden is soon expected to enter as the overwhelming favorite. One hurdle likely facing Kennedy as he attempts to win over Democratic voters: his own family. Some Kennedy family members have denounced his views...