Hillary Clinton’s introduction of the possibility of recession — the first time the word was used this evening — made her sound commanding. The weakness of the economy, I suspect, will be the most powerful theme in the race for the next month, precisely because no one really knows how things will pan out. Yet once again, this reminds us that failure is the Democratic strong suit. Clinton’s response to economic uncertainty is to talk about fuel efficiency and the under-taxed wealthy. There is a serious opportunity here for sunny, Reaganesque optimism here in response.