Could it be a hearing aid? That would be a more visual and damaging indicator of her [declining] self.
A hearing aid would be 100% allowed, if it was a true hearing aid.
Listen to her latest speeches or talks. She speaks (sometimes sounding a bit drugged) in perfect little clauses, pauses as if to think, then finishes the sentence perfectly. It doesn’t work like that, speaking off the cuff. It seems like she is reading. Another clue is at the end of one phrase she will end the sentence, by mistake too early, and then have to restart and ended sentence.
Such as: “and that brings us to where we are toDAY!” [whoops, after her strong sentence ending, she hears the rest of that sentence...] “which is why Donald Trump cannot be President!” She’s hearing the phrases and repeating.