How do you make sense of Barack Obama and John McCain? The odds are that you judge them mainly on two dimensions: warm/cold and (in)competence. Depending on your experience of them, you may judge one of them as both warm and competent, evoking your admiration and pride; and perhaps the other as neither warm nor competent, which triggers a sense of contempt and disgust. Or perhaps you view one as warm but not competent, which generates pity and sympathy; or finally, you could judge one of them as cold but competent, leading to feelings of resentment and even envy. All the media hoopla boils...