They're demoralized. And frustrated.
They were promised that Bad Orange Man was going down, but after around 4 years worth of exploding cigars and Wile E. Coyote pratfalls, it's sunk in to those with measurable neuron activity that it's a mirage, not gonna happen and that they were strung along. You can see the frustration boiling to the top across social media on the internet. Lots of snarl directed at the POTUS, typically accompanied by a lack of proclaimed support for one candidate over another. At this point guess they're just waiting for whomever it is that gets determined for them to vote for.
Yep........They're demoralized and frustrated but not defeated. Watching the Dem. primary so far has proved their voters are as bewildered as the candidates themselves as to what to do, but make no mistake they've got some tricks up their sleeves they've yet to play.
If the rumor's true Romney's switching to Demorat and running for VP with one of their candidates, (likely Bloomsberg), then that's going to change the fields equation.
Further... they well know that Bernie's going strong at the moment, and regardless of what they say they will indeed support Bernie, if no other choice, rather than see Trump win another term because their hatred is that all consuming,and they will be at the polls to vote... count on it...never underestimate the power that's behind hatred..
The Dem voters want something ‘other than’ the choices they've been given and I think that's going to come into view before long.