Well to be fair, class identify is just one plank in a large party. And Bernie is killing it on that front (just like Trump on the other side). But he's getting killed on the racial unity front, feminism front, multicultural open borders front, among others, that are equally as huge in the Democratic party.
I don't get all the whining. Trump and Sanders are the most viable candidates on the pro-middle class, anti-wall st/giant corp. front that the working middle class has had in 25 years. This is what the OTF claimed they wanted.
Now if you don't want to vote for them because they are too white, not feminist enough, or not evangelical enough... then fine. But at least have the intellectual honesty to admit to yourself that you care about other issues more than you care about the pro middle class issue.
You're not going to get a perfect candidate. You're definitely not going to get perfect pro middle class candidates (because *shocker* people with money in the upper classes don't want to fund them).
George Washington ain't riding through that door. Andrew Jackson ain't riding through that door... in fact he's losing his spot on da' twenty.