"That same NBC poll shows only 23% of respondents find Hillary Clinton trustworthy. That's pretty horrible."
Actually, it's not horrible at all. What's horrible is that people find NO politicians trustworthy. But that's been true since, I dunno, the Eisenhower administration.
But you can't look at one line in a poll, because that's just one question, phrased in a certain way. A poll includes a dozen or more questions, intended to get true reactions and not just immediate responses.
If you look at Hillary's positive/negative ratio in that same poll, she breaks even at 42% positive, 42% negative. While that's down from 44/36 before the false charges in the scurrilous book were circulated, she's still way ahead among Democrats, where her score is 81% positive to 6% negative.
That's only 6% of Democrats have a negative opinion of her. They have big mouths and media presence but they're a small minority of voting Democrats. That 81/6 ratio is not very different from before the attack book came out, when it was 82/4.
When you compare that horrible 23% to how people feel about the Republican candidates, it still exceeds their favorable/unfavorable scores:
Marco Rubio: 22% positive, 23% negative
Scott Walker: 15% positive, 17% negative
Rand Paul: 23% positive, 28% negative
Jeb Bush: 23% positive, 36% negative