> "Oh, I really don't understand American demographics very well."
Every few years, something pops up that shows most of us don't understand our own demographics. Such as polls where the majority of Americans estimate the black population to be around 40% (it's actually around 10-15%), or the LGBT population around 20-30% (it's actually around 5%, maybe even lower), or, well, the Trump election.
My personal take: The media was so focused on Trump's personality quirks that, however bad they are, it seemed like they had nothing bad to say about his actual ability, accidentally making him appear like a pretty good candidate (especially compared to the actually-relevant-to-the-job controversies around Clinton, like email security). So while I was a bit surprised that he won, I always expected it to be a close race.
I think ability-vs-personality is one of those things that people largely mistake what other people will care about.