Let's suppose Obama wins the most delegates in the primaries/cacuses (excluding Michigan and Florida). But the margin is small enough that Clinton wins with superdelegates (Democratic office holders who automatically get to go to the Convention). How legitimate does a Clinton win look to Obama's constituencies? How likely is it that the Democrats can still win in November in those circumstances?
For extra credit,
Does it matter if Clinton wins most of the votes?
Does Clinton pretty much have to make Obama the VP candidate then? Would he take it?