Here's a question to be asked, though. We've heard, for the last eight years, that Hillary was going to be the next nominee, that she was going to be the one, that her being SecState was just a sidestep on the road to being the first woman President.
Let's grant that she wins the nomination and goes up in the election against the Republican candidate (who looks more and more like it WILL BE Trump every day).
What happens after the election? Regardless of whether she wins or loses - the Democratic Party is going to need someone to follow her. All that changes if she wins is how long the Democrats have to pull up a candidate. If she loses, they'll have 4 years; if she wins, they'll (probably) have 8. How many Democrats can we name that would be recognized in, let's go Congressional here, 2/3rds of the states? Half of the candidates in this election were guys I had never heard of!
Republicans, on the other hand, have a far larger set of names they can pull on that people have seen in the news. Cruz. Rubio. McConnell (though I think he won't run, given his age and that the GOP is trying to court the youth vote). Christie. Paul. Part of that, I think, is for 6 of the last 8 years, we've heard the representatives of a GOP-controlled Congress bitch about how bad Obama is/was.
To a certain extent, Obama actually did Clinton a favor by getting elected in front of her - because it let her stay in the political sphere for another 8 years.
Now, there's a couple of people I could personally name that I would vote for in 4/8 years time, but I don't really think they have national-level recognition yet. So here's the question: what does the DNC plan to do?