However, her victory would've been utterly marred because of the other unfavorables. At best, she'd would've ended up like Bush Sr and just a had mediocre presidency in frustrating gridlock...only to be taken out in 2020, a loss far costlier than this.
At worst, she'd end up like Richard Nixon [instead she's more like Richard Nixon was to Democrats before Watergate] and actually do something awful out of sheer paranoia.
I don't know what's worse: losing now or losing later.
Even if Comey didn't sent the letter and even if she barely won, Republicans would likely run a half-sane opponent and beat her in 2020.
Probably, but at least she would have gotten a reasonable Supreme Court Justice nominated and possibly taken action to fix (and thereby protect) Obamacare.
Most importantly of all, it would mean no President Trump, who I think will be one of the biggest calamities in this country's history.