Has anyone read studies on the facial expressions and movements of the candidates, the non-verbal communicatio?

It is said that this can be more important than the words- for instance, if people nod ';yes'; when they say ';no';, they are lying, or not agreeing with their speech writers! And when they clench their fists, it might mean a certain something, etc.Has anyone read studies on the facial expressions and movements of the candidates, the non-verbal communicatio?
The O'Reilly Factor addresses this once a week. Yes, it's interesting.Has anyone read studies on the facial expressions and movements of the candidates, the non-verbal communicatio?
Fox News often has body language experts on to assess politicians during interviews or speeches. I have seen them examine Hillary Clinton during her Bill O'Reilly interview, but I haven't seen any of the current candidates.