There is a post here that lays out one persons "Election Blame List".
The essay contains numerous talking points on why Clinton lost. One dealt with the alleged "smallness" of her message.
To that I would reply:
Why look at the Clinton platform as a ceiling? There were many parts of the platform that were quite progressive. If we look at that platform as a foundation rather than as a ceiling, one can envision building on that foundation rather than wondering at this point how to save what has already been built from the counter-tide of Trumpism.
So in all of the election post-mortems and various types of finger pointing and assigning blame, and there is blame to go around, we must keep in view that a majority of voters who voted chose Clinton. The Democrats must, in my view, motivated the unmotivated and reach the until now unreached to grow the Democratic Party.
As to the so-called Reagan Democrats, many of them are racists who only became Republicans in response to Reagan's racially coded language.