Trump's rambling nonsense, Bernie's eccentric gesticulation, and both of their accents are typically just taken as some sort of endearing. Although, I think it's not just that she's a woman, that's definitely part of it. But it's that she's Hillary Clinton.
Stray thought on the death penalty as I was reading through some coverage. While I think Sanders is right on this, from a political perspective I can see how it could backfire in a general election scenario were he to get to that point. As, for whatever reason, people in the US still support it in the majority.
In particular, I could see a line like how the government shouldn't be involved in "killing" being thrown back by a Rubio or Trump with regard to abortion rights i.e. in GOPspeak:
"So you don't want to kill murderers, but you're fine with killing babies."
I'm not sure if this is in part why Dem candidates generally demur from outright saying it should be banned and instead reserve it as a punishment for the "most heinous crimes." This is, to my knowledge, the position Obama used.