> The paper, obtained by Bloomberg and discussed here for the first time, describes in granular detail the difference between Trump’s campaign, which was focused on finding new donors, and Clinton’s campaign, which concentrated on ensuring Clinton had broad appeal.

Here is the heart of the matter, sans the latest attempt at naming a scapegoat for Clinton's loss.

A populist candidate focused on leveraging the people who were becoming receptive to his message, while an establishment candidate focused on trying to nudge over people who weren't inherently receptive to her message. That's the whole campaign in a nutshell.