Several posting suggest Hillary has the nomination locked up.
If Obama does well in CA, how does she have it locked up?
Superdelegates. The Democrats basically front-load their anointed candidate with tons of endorsements by Congressmen, party bosses, etc. that can be used as delegate votes at the convention. Smoke filled rooms and all that fun stuff.
Neither has this locked up. They will finish the night within a few delegates of each other, guaranteeing the fight goes on for a long, long time. Simple mathematics. Unless one of them has a complete meltdown (whoch may happen), neither candidate can get to the magic number during the primaries.
The Deomcrats are shaping up for a brokered convention because of their decision to allocate delegates proportionally.