Looking back at the first presidential debate, I would argue that the most revealing moments occurred before anyone walked onto the stage. Hillary Clinton worked hard at debate prep, spending hours in mock debates and poring over briefing books. Donald Trump took a more relaxed approach, chatting with aides over bacon cheeseburgers and not hitting the briefing books very hard. This is who they are. Clinton’s a grinder, a Plan B kind of gal. Trump prefers to rely on his gut and wing it. For my money, the presidency is too complicated, the times too dangerous to simply wing it.