Robert F. Kennedy Jr., an environmental lawyer, is a leading vaccine skeptic and purveyor of conspiracy theories who has leaned heavily on misinformation as he mounts his long-shot 2024 campaign for the Democratic nomination.
Here are five of the many baseless claims Mr. Kennedy has peddled on the campaign trail and beyond.
He has falsely linked vaccines to various medical conditions.
Mr. Kennedy has promoted many false, specious or unproven claims that center on public health and the pharmaceutical industry — most notably, the scientifically discredited belief that childhood vaccines cause autism.
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He has made baseless claims about a connection between gender dysphoria and chemical exposure.
In an interview last month with Jordan Peterson, a conservative Canadian psychologist and public speaker, Mr. Kennedy falsely linked chemicals present in water sources to transgender identity.
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He has falsely linked antidepressants to school shootings.
Drawing on longstanding dubious claims, Mr. Kennedy has repeatedly endorsed the idea that mass shootings have increased because of heightened use of antidepressants.