I read that she had Bell’s Palsy.
Bell’s palsy is a paralysis or weakness of the muscles on one side of your face. Damage to the facial nerve that controls muscles on one side of the face causes that side of your face to droop. The nerve damage may also affect your sense of taste and how you make tears and saliva.
Bell’s Palsy Causes, Symptoms, Treatments - WebMD
webmd.com/brain/tc/bells-palsy-topic-overview
You may be correct. I had read in a print newspaper that she had been attacked by a dog as a child/teen. But doing a Google on it turns up Bell's Palsy in a couple of places. As far as I'm concerned she looks fine, and I never really noticed after the first couple of times I saw her, back in the OJ days.
Total non-sequitor but according to Wikipedia she is also an advisor to Sarah Palin.
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Bells palsy is a usually temporary flare-up of the chicken pox virus, that lasts about 6 months at most.