While Hillary Clinton shook her head side to side no while making a positive statement once in speech, Mitt Romney does it often in interviews. He does it repeatedly in an interview with Hannity on Fox news. For example when saying, “ I don’t think people care a lot about which church you belong to he shook his head side to side indicating a no as he said, “I don’t think people care a lot…” When someone makes a positive definitive statement and shakes their head no it appears that they are lying. (This head shaking cue is one I taught in my interviews and interrogation techniques courses to law enforcement) So it looks like he actually believes they DO care a lot! He even does it on a video on his own website as he discusses what he believes. Like a twisted mouth shows your talking out of the side of your mouth this may be a habitual cue showing he is not sure what he believes.
He also like McCain in several of his interviews uses a “masking”, a tense fake smile to cover his displeasure at how the interview is going.
While many candidates, Giuliani, Clinton and Edwards use aggressive and powerful chopping motions as they speak Romney’s hands more often stay cupped and sweep out which makes him appear less definitive and aggressive and on the issues. He even does this in a video of his speech on topic he feels strongly about the Islamic Jihad.