they're profoundly uncomfortable with Clinton as a candidate,
[citation needed]
Perhaps most telling is how poorly she scores when all voters in these three key states are asked about her empathy, honesty and temperament.
In Florida, Ohio and Pennsylvania she averages a negative 37–55 percent favorability.
Clinton gets a negative 37–55 percent favorability rating and voters say 64–32 percent she is not honest and trustworthy. Biden gets a split 44–43 percent favorability rating and voters say 52–40 percent he is honest and trustworthy.
58. Would you say that
-
Hillary Clinton cares about the needs and problems of people
like you or not?
FL OH PA
Yes 42% 43% 43%
No 55 52 53
DK/NA 3 5 4
Now, I wish the Quinnipiac poll had crosstabs to indicate what chunk of those with negative favorability and negatives on the "cares" and "trustworthy" questions split for Biden and which split for Sanders.
Look, I get it -- you've already ordered like 500 Clinton '16 t-shirts and the Hillary Clinton cuddle pillow, and you'll be damned if some unwashed socialist like Sanders or some biker-groping putz like Biden is going to screw this up for you.
But you have to concede that Hillary is genuinely distrusted by a number of people who are card-carrying Democrats, by even more people who are independents, and is considered the Antichrist in a pantsuit by most Republicans, and has been since the 1990's.
It's a long way from a collapse, but her aggregate poll numbers have dropped 6 points in 3 days. The last couple of national polls have her lead on Sanders under 20 points, after months of holding a 40-60 point lead. Some of it could be history remembering itself -- people who thought her invincible are remembering her stalling out in 2008 (admittedly much further into the process than now) and might be thinking "Holy shit, maybe it's gonna happen again and support for Sanders/Biden/whoever actually could count for something!"
Maybe she's the Peyton Manning of Presidential primaries. Who knows? All I know is that getting bitchy and whistling past the graveyard any time someone brings up the subject isn't going to sway anybody into thinking you're right.