@Olivier5,
Did you read
any of the article on Biden?
Look, Olivier5, I set up a particular scenario which could end with a Trump victory. At this point we don't know who all the serious candidates even are.
I like Biden. As of now I have no preferred candidate — I'd prefer it weren't Biden but I wouldn't have difficulty giving him my vote should he prevail.
Given the dynamics of the '16 race and the division in the party between the progressive wing and the establishment the primary system could end up leaving a very divided party.
Did you notice, I said "could"? Maybe the process will go very differently. From what I've heard, the party is trying to find a way of organizing the debates to give all the candidates good exposure. Maybe some candidate will emerge from the field and be embraced by a clear majority of primary voters. But, in any case, I think the apparent divisions in the Democratic Party will need to be dealt with. And I'm not the one threatening to withhold my vote whether an establishment or a progressive candidate should win.
So basically, your critical comments are unhelpful, unnecessary, and unconvincing at this early stage of the campaign.