Here's how the Democratic post mortem will go

"Dark"
"Angry"

In all seriousness, the standard OP is to spin post mortem to both something that is more palpable or diminishes the damage and to redirect messaging. In this case it will be something along the line of "what the obvious message the american voter was sending is that they are tired of politics as usual. It was an anti establishment vote but the goals are different, more nuanced than you think. People want the Republicans to reach accross the isle and work with dems....to put country over party and "make america great again" thats what voters want.