When the dust finally settled, Hillary Rodham Clinton was the last man standing in the bitter and tumultuous fight for the Keystone State, although her exact margin of victory is not yet clear.

Unfortunately for the New York senator, her much-needed victory in Pennsylvania does nothing to obscure the fact that she still lags behind Barack Obama in pledged delegates, popular votes, and the number of states captured. Even her lead in superdelegates has been constantly...