Feel the Bern

[Yonadav]

I think Sanders declaring that he's running increases the chances of Biden declaring, since Biden would make a strong moderate candidate to challenge him. And Biden would likely do better against Sanders than Clinton.  

So in the end, I think Sanders running will do less to advance his stated agenda than letting the younger people take up his banner.

I think that if Bernie doesn't get the nomination this time, then there is a pretty good chance that he will play the role of king maker. The nomination will go to the person that he backs.