evidence: Robert F. Kennedy Jr. is no stranger to FactCheck.org. He is a prominent anti-vaccine advocate who has been on our radar for years, primarily as the founder of Children’s Health Defense, a nonprofit that spreads anti-vaccine misinformation. [...] In April, Kennedy — the son of a former attorney general and presidential candidate, and nephew of President John F. Kennedy, both of whom were assassinated in the 1960s — officially entered politics for the first time, announcing his bid for the presidency as a Democrat challenging President Joe Biden. He has virtually no chance of nabbing the nomination, but he has received more media attention in the following months that has allowed him to spread false and misleading health claims. [...] Update, Aug. 23: Independent presidential candidate Robert F. Kennedy Jr. suspended his campaign on Aug. 23 and encouraged his supporters in key swing states to vote for former President Donald Trump.