This forum's turn on Clinton is absolutely unreal.
Yeah, it's shocking for me too. Particularly because the Comey letter was a direct hit (for massive damage, blah) to her critical weakpoint: the (delusional, but somehow existing) notion of her being not trustworthy. It wasn't just some random guy, it was the FBI, lending immediate credit to what had been slow to degrade already. People with lower education respond highly to appeal to authority, and psychology tells us that humans don't process good news just the bad news so the second letter meant dick in removing that. It is a very large factor in explaining how she got to be unfavorable.
The second would be the Electoral College nonsense, meaning the loss of the rust belt suddenly means a loss on all. The only way to combat that or even prep for it is to campaign on a few swing states and ignore the rest. Somehow, the Trump campaign DID realize that and got the support in locomotion, which was really not there -or not much- before the Comey letter started the train (I seem to recall there being a name for this process in social action theories, but it escapes me right now). They're really not wrong in their reasoning there. It's a complex pattern, not the simple 'this!' or 'that!' gaf is now trying to play at just to pretend they didn't set themselves up for a loss. The candidate didn't lose, you people did. Gaf just wants to restore feeling superior by blaming someone else, too. Quite a bit of irony.
That said, they definitely fell for the nerd fallacy of trusting in statistics and not talking to people on the ground. It's like predicting the weather: even if you know the macro average, you still can't predict local weather more than 48 hours in advance. Anything beyond that is conjecture at best. However, the vast discrepancy between polls and results does show an extreme error in method and subsequent beliefs among staff and potential voters, like gaf here.
But! They are far from the only ones to do so. For those of you who fail to notice it: nobody called the UK election going to the Tories either, and they themselves then proceeded to dramatically miscalculate the Brexit referendum. And back in Obama vs Romney, the latter was convinced he was winning too, and only then discovered he wasn't, similar to Clinton's defeat. These patterns cannot be explained (anymore) by conventional polling methods and analysis, and additionally voters have become too volatile or too disconnected from political reality to correctly understand what it is they're voting for (see Brexit's Google results immediately that night).
Civic Literacy is always low (roughly 7 to 10% of the population), but the age of smartphones, conspiracy alt-right becoming mainstream, and the age of bullshit (see Fox News, where people watching it are much less informed on topics then people who watch
zero news. And that's a real number btw), have changed dramatically how and at what speed these processes can play out. Most voters likely only changed their minds within the last 48 hours before the election date. There is no polling method on this world that could prepare anyone for that. See Britain, see Brexit, see most likely the upcoming election in France due to having the same system as the US.
They didn't lose because of lack of skill, they lost due to a lack of voters, which can only be explained, lacking any causal way to do so, by lack of luck and voter volatility (not being able to trust someone to actually act as they say). Don't confuse success for having a plan. Donald Trump doesn't have one, and he's been successfully elected because Democratic voters didn't show up.
The question should not be "who is to blame" (seriously, stop that, gaf), but "how do we get the information we need in order to make informed campaign decisions for the future". Otherwise, you're going to lose the 2018 Congress election too. That I
can guarantee.