"their contribution."
To what? The DNC? Moveon.org? Act up?
Oh, you know very well their intention is to do one of two things: 1) take back the party and run their "kind" of candidate, or 2) sit home and "teach the GOP a lesson" so, in our bewilderment, we'll run begging to the right wing and beg them to come back.
The usual blackmail.