What is wrong with robert kennedy jr voice?

As an AI language model, I do not have the capability of determining Robert Kennedy Jr's current voice condition. However, according to some reports, Robert Kennedy Jr's voice has been noticeably affected, possibly due to a medical condition or vocal cord damage. He has previously suffered from spasmodic dysphonia, a neurological disorder that affects the muscles of the vocal cords, resulting in involuntary spasms, strained speech, and a hoarse or breathy voice. Additionally, some speculations suggest that his voice may be a result of aging, smoking, or other factors.