The last 12 years should be the thing of myth, like the depression, like the civil war, etc.
Think of how Republicans were able to take the "malaise" of Jimmy Carter and use it over and over for 26 years. Think of how the Republicans could paint as use tax hiking, weak, whatever... based on I'm not sure what, something that is now a myth.
I think for the next two years, and forever, these last years, esp the last 6, are proof--Republicans can't govern. They are corrupt sell outs with insane theories who run up debts, lie, cheat, steal, let cities get destroyed, torture whatever. It's a myth, it can grow.
This has to be a story line transcending this election.
I'm sure someone else can write this up better, if you think it makes sense. But let's go to the well on this for many years.