Something is persuasive, wrote Aristotle in The Rhetoric “because there is somebody whom it persuades.” (Book I, Chapter 2; in the Penguin Classic translation by H.C. Lawson-Tancred this is “Persuasiveness is persuasiveness for an individual”). For Aristotle, persuasion relies on three types of proofs - ethos, pathos and logos; appeals to the character of the speaker, appeals to emotion and appeals to logic.
Senators McCain and Obama need to persuade two audiences: their respective bases and the group of swing voters in the middle. These audiences sometimes need to hear different things from a candidate. Going into the conventions Senator McCain had a lot of ethos with the swing voters, he was seen as a trustworthy man of character. He didn’t generate a lot of pathos, and he didn’t have much ethos with some conservatives (something Palin helped solve, at least for the base – possibly at the risk of the swings). Senator Obama has tons of pathos which brought along the base and tempted the middle – but for many he has fallen short on ethos. This is an argument that McCain (and now Palin) have been making for a while, that Obama is may talk good but he doesn't have the substantive chops to lead the nation.
Presidential campaigns are not decided by logos. When we vote for a president we are not voting on the specific facts of a case. Aside from a relative handful of single-issue voters, Americans vote on an approach to facts rather than on facts themselves – we vote on a point of view on the role of government and on discussions of America’s place in the world.
Recently Obama has been trying to increase his ethos by speaking to smaller crowds, going into policy detail and so forth. He has also been attacking McCain’s ethos, asserting he will do anything to get elected. Obama is telling voters that McCain was once trustworthy but is no longer.
Which brings us to Friday’s debate.
McCain needs to demonstrate some pathos, he has to stir voters without Palin at his side. Primarily he needs to focus on ethos. He has to demonstrate that he can be trusted in trying times, that he “gets” most Americans - and he needs to do so in ways that speak to both the base and swing voters, a tricky task. He also needs to keep attacking Obama’s ethos, making the case that at some base level Americans can’t trust Obama.
Obama has to do the same. He needs to demonstrate that he is a man of character who can be trusted and to go after McCain’s ethos, arguing that McCain will say anything to get elected. At the same time he needs to tamper down the pathos, he needs to recognize that a debate is an intimate setting and not an arena – that he will be in our living rooms having a conversation, not on stage having a concert.






