This idea of electability is, in addition to being hopelessly circular (he has the support because he's electable because he has the support because he's electable because he has the support), simply can not serve as the explanation for supporting a political clone of the loser who found a way to lose with a winning hand last time. That's precisely the losing path that people who are primarily motivated by fear of losing again would be running away from screaming. Fear of what happened before causes avoidance of the traumatizing circumstances, not duplication. There's definitely something else. The only question is what.
I have my suspicion but no objective way at the moment to determine its accuracy or its odds of being correct compared to some hypothetical alternative. Remember that one of the things about him that make it so peculiar is that he's openly declared his overt contempt for a large chunk of the Democrat voter population (young adults), and his supporters didn't care because they weren't in that group; they're old. Just look at the videos from his public appearances: the audiences seem to consist entirely of great-grandparent-aged people. (His numbers have slid in the last couple of polls, but too late to be a result of this issue.) They were the voters whose votes got the country into its current state, which they see younger people saying isn't good for them and needs to be fixed, sometimes even complete with explicitly putting the blame right on them, the older voters (but it's a simple enough implication to figure out even when it's not made explicit). They see themselves getting attacked in a war of age groups (with other old candidates like Sanders & Warren joining the other side), and one of the classic human defensive reactions is to dig in and insist on sticking to the same old position.
That "digging in" tendency might be even stronger in the case of denial about having done stuff that's detrimental to your own kids & grandkids; notice how rare it is for people who refused to get medical help for their sick kids, but just kept praying while those kids died, to eventually admit "I killed my kid". That's a really long leap for a human brain to make, no matter how loudly the facts scream it in your face.
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What stereotyped group is imagined as having goatees and being misogynist? I thought goatees were supposed to usually be stereotyped as belonging to a certain type of lefty. Is this one type of lefty calling another type of lefty misogynist in a specific left-vs-left thing I haven't encountered before? Or is it meant to describe some imagined goatee-wearing righty stereotype I've never encountered before? And either way, how was anybody outside of the little enclave circulating this new stereotype among themselves ever expected to know about it? Are we supposed to know this group's secret handshake and password, too?
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Hillary wasn't "supposed to win" according to anybody who was paying attention to the facts instead of just substituting their own wishes in the place of the facts. The polls were right all along. She never showed any particular sign of having much electability at any time.