As far as the debate itself, both sides had moments and missteps. But while Barack Obama spoke clearly and plainly about energy, tax policy and the economy, John McCain tended to wander in his thinking until he found a foothold and then burst into a diatribe about one of his campaign's topics. It even seemed as though he was attempting to prove his political know-how by referencing vague and obscure policies, bills, and so on.
If tonight wasn't a clear demonstration of why John McCain is not capable of running the country then I don't know what is.