"When people say that Democrats should unify, the part they leave out is most important: Around what?

Right now? This minute? The answer is crystal clear...Oust Trump.

That dynamic isn't going to change. Angry voters show up to vote.
That's our 2020 wild card, almost a "get out of jail free" card.

There are several issues worth unifying over beyond that though.

Immigration reform. A Democratic controlled government can do it with a few swipes of a pen.
Double the minimum wage. The house just passed a bill to do it.
Open Medicare up to people 55 and older with plans for further expansion.
Make higher education more affordable and abolish student debt.
Get rid of the Social Security cap entirely.

That's a few things.
Good coffee, good weed, and time on my hands...