Amy Cuddy

Politicians are very experienced - maybe too experienced - at using body language to signal power and competence. But what these politicians are much more likely to struggle with, or just neglect to do altogether, is communicate warmth and trustworthiness.

Some of the reasons John McCain lost in 2008 were his lackluster campaign, his refusal to showcase Obama's extreme liberalism and, thus, his failure to demonstrate why he would make a better president than Obama.