20 is the net gain for Clinton compared to Obama tonight not total number of delegates.
For the night, Clinton won at least 185 delegates and Obama won at least 173
She made up 12 delegates for the night and his lead is well over one hundred to start and still over a hundred with not that many states left to go.
http://www.freerepublic.com/focus/f-news/1980811/posts
Some of you hysterical hyperbolic RDS folks oughta relax a bit. This is the fourth round of a PGA event with Obama leading the field by 9.