Robert F. Kennedy Jr.'s voice sounds strained and raspy due to a rare neurological disorder called spasmodic dysphonia. This condition causes involuntary spasms in the muscles that control the vocal cords, resulting in a voice that can sound broken, strained, or breathy. Kennedy has had this condition for many years, first noticing symptoms in his early 40s, and it has affected his ability to speak normally, making his voice tremble especially when he starts talking. There is no cure for spasmodic dysphonia, but treatments like medication, voice therapy, and botulinum toxin (Botox) injections may help manage the symptoms, though Kennedy has stopped some treatments that did not suit him. His condition is neurological in origin, likely involving brain regions that regulate muscle movement, and it affects about 50,000 people in North America. Kennedy has openly discussed his frustration with the condition and his sympathy for those who have to listen to his altered voice.