The question of what is "presidential" has become a topic in the presidential race. Donald Trump, responding to calls from his wife and others that he should act more "presidential," mocked the notion that he should adopt a more "presidential" manner this week, saying that he’s the most "presidential-looking" candidate. So, what does it mean to be "presidential"? Is it looks, as Trump would have voters believe? Is it dignity? What do voters want from their presidential candidates?