A New York Times delegate counter makes pointedly clear that it will take a miracle for Hillary Clinton to win the Democratic nomination in 2008.
The number of superdelegates she must win if she wins a number of primary/caucus delegates within a plausibly likely range, is extremely high. This is particuarly true considering that in those scenarios, she will go into the convention with a minority of pledged delegates, something that will make it especially hard for her to win the two-thirds plus of remaining superdelegates sh will need.
The number of primary/caucus delegates she would need to bring the number of superdelegates required to a plausible level would require a sea change in public opinion in the remaininig states over the next month. But polling shows no sign that this is happening.