@revelette2,
Maybe "base" isn't the word to use. But "independent" and "democratic-leaning" aren't very good terms to describe most Bernie supporters either as they imply people who are in-between Democrats and Republicans. That isn't true at all.
I support Bernie because I believe very strongly in what I consider progressive values like single payer healthcare, economic fairness, an end to military interventionism and social justice. On every one of these issues, Hillary Clinton represents a step backwards to me. I consider my positions as fully in the Democratic party (as stagnant as the Democratic party has become).
The Democratic party needs us (whatever you choose to call us). The Democratic party claims to be the party that supports our values and they certainly are counting on our votes. Since we are locked in a two party system, we need to work within the Democratic party... which is what we are doing.
The efforts made by the Democratic party establishment and the Clinton campaign to silence people trying to challenge the status quo are frustrating.
I wonder if just stifling dissent really is a better option than splintering the party. If the Republicans come back in 8 years with new ideas and a new purpose and new political strength there may come a time when we envy the fact that they are splintering now.