the big problem that sanders had was that he couldn't get his people registered in time. all of these kids out at those rallies couldn't vote for him.
so, the focus over the last several years should have been on a massive voter registration drive, in order to shift the democratic base away from older conservatives and towards younger voters.
however, all of this anti-trump mainstream media coverage in the centre or even the right of the spectrum, the maddows and the snls and whatnot, has turned anti-trumpism into a popular movement, rather than a political one. and, if you're a democratic party oligarch, that's the kind of registration drive you wanted. you don't want college students with massive debts that may or may not show up, you want middle aged professionals that are able to donate to the party and are going to register when they're hooked.
so, the problem that sanders faced is going to be exacerbated - it's going to be impossible to win the primary.