A dark horse candidate like Trump was last year.
Somebody who can successfully corral SJWs, moderate democrats, and rust belt union workers behind a single banner.
Somebody who's very likeable and charismatic, preferably somebody who speaks like Trump and Sanders speak with a straight shooter demeanor.
I don't know who could do all of that but if democrats can find that person then they'll win.
So basically you fear Joe Biden?
He might be too old now. He would've likely defeated Trump this year though.