In all fairness, Clinton has been subjected to massively rigorous public scrutiny since her husband took office many years ago, so her unfavorable numbers are cumulative. Indeed, the fact that she's survived years of microscopic examination is quite impressive. She's not perfect, but she's a known quantity. If we're all honest, we'd admit that none or very few of us on this site would survive the type of scrutiny to which Clinton has been subjected. The concern with Sanders is that he's never been subjected to the kind of rigorous and persistent scrutiny to which Clinton has been through. Thus, Sanders would pose more question and uncertainty if he were to become the Democratic presidential nominee. I'm not sure that long-term, loyal Democrats who truly care about the future of the Democratic Party and its platform would choose uncertainty over certainty, regardless of the seeming popularity of Sanders' ideas amongst the millennials.