Hillary Clinton's campaign is like the hospital patient who died after a minor infection overwhelmed a compromised immune system. Had the patient been healthy t...o begin with, the Comey letter and the (likely) Russian hacking would not have mattered -- though I doubt the latter was a major factor.
Donald Trump was elected president despite all his manifest flaws because his willingness to engage the news media over the course of decades built up his antibodies to whatever negative scandalous revelations might appear throughout the course of the campaign. Sure, not all press is good press, but when the explosive Trump tape hit, his campaign got a cold it quickly recovered from a couple weeks later, while the boring bureaucratic Clinton scandals caused her campaign to be in and out of the hospital for 20 months. Trump's ability to parry scandal into spectacle and drama is a key feature of his strong "immune system." By rolling around in the mud, it turns out you don't get sick as often as someone who avoids all contact with anyone who might make them sick (e.g. the press).
Someone else who had this ability to dodge scandal, to get voters to buy into his misbehavior as part of the overall package, was Bill Clinton. The question of what Bill would do to escape Houdini-like from the latest scandal bears a lot of resemblance to the parlor game of obsessing over the latest thing Trump said on Twitter to distract us. If we're being honest with ourselves, we're entertained by this sort of thing. And, as was true in the '90s, voters prefer to be entertained than not. Hillary was the opposite of her own husband, eschewing the limelight, and acting cornered in the face of scandal instead of going on offense. Maybe there's something virtuous to not being like her husband, but politically, it's the reason she's spending her days hiking in the woods and not planning a transition to government.