Over in the comments section of a John Cole post at Balloon Juice, MBunge makes this point:
If you want the Republican Party decimated, then Obama should be your guy. Because he’s the only Dem candidate that could decimate the GOP where it really matters…at the ballot box, sweeping a buttload of new Democrats into office with him. Can you imagine, even in the best possible circumstance, Hillary doing much more than edging out a narrow victory that leaves the current status quo in place?
This might be the real issue at hand in the Democratic primary: not who will win the General Election, but the circumstances under which the election is won, and how they will govern. Style does matter.