Citing unverified data, Robert F. Kennedy Jr. claimed in December 2021 that the Covid-19 vaccine was the “deadliest vaccine ever made.” A few months prior, he petitioned the Food and Drug ...

Robert F. Kennedy Jr. in the New Hampshire Capitol in Concord during his 2023 run for the White House. (Sophie Park for WSJ) Robert F. Kennedy Jr., the nephew of the late President John F.