I think I can accurately say why not Bernie, or Hillary for that matter. The Dem party in general is damaged goods thanks to 0bama. Less people are willing to take another chance on that, and it's been too long since Bush to keep blaming Bush at this point.
I'm not even sure what they have left to run on without someone to blame as it has been the main tactic up to the last election, unless they blame themselves/eachother which I don't think works. And what happened in recent elections? Dems lost both the house and the senate. And that power shift isn't over.
When people say this politician or that politician can or can't win against the dems, imo Donald Duck could have victory over the democrat party at this point.
Ok all you libs, time for the
trololol song