I had a feeling this was going to be tough. Hillary Clinton has eviscerated the Democratic brand in Ohio. Over 400,000 Democratic voters disappeared last year, the beginnings of a West Virginia-style collapse. Otherwise, I'd say Brown would be a good potential presidential contender, but he's gotta fight tooth and nail just to stay alive.
Who's still going to be thinking about Hillary Clinton in 2018?
It depends on how active she is. But more importantly, what else is there for the average voter to think about as far as Democratic standard bearers? Hillary was the last "taste" of the Democratic party these voters had, and that'll be true until there's a new nominee.