'Captured' is too strong a word I think, but when Democrats are rich enough to benefit personally from Trump's policies, the working/middle classes simply do not believe they represent them anymore.
The democrats are actively trying to get the "moderate republicans" to vote for them and they're losing the left in the process. If I were American I'm not sure I would have voted at all.
All people do is project because there's no substance in the republican platform. There will be a lot of terrible awakenings for many people over the next four years and beyond.
Never realizing that most of these expectations directly contradict each other. That's the power of running on personality and rage-bait instead of agenda.