Hillary’s chances are impossible to predict

… We have no precedent for a potential nominee, outside of incumbents, seeming to be as strong as Hillary Clinton right now — at least in the opinion polls. But because it’s unprecedented, there’s really no way to know what it means. Is her overwhelming lead hard or soft? We don’t know, and won’t until she’s attacked by a Democrat or stumbles on her own, and it may be a long time before either happens. [cont.]

Jonathan Bernstein, Washington Post