Almost nobody contends that Clinton has a chance to overcome Obama's lead in pledged delegates. The spin now is that Obama's delegate lead is "small but almost insurmountable" (USA Today) and that, since neither can clinch the nomination with pledged delegates alone, "the nomination is expected to be in the superdelegates' hands" (Los Angeles Times). These beliefs reflect the mathematical illiteracy that has allowed the press corps to be routinely duped by economic flim-flammery. A lead that's insurmountable is, by definition, not small. The very primary rules that make it impossible for Clinton to catch up--proportionate distribution of delegates that award tiny net sums to the winner--are exactly what made Obama's lead so impressive.
The notion that the superdelegates will decide the race implies that pledged delegates won't matter--like a sports event that goes to overtime. Obviously, though, the pledged-delegate count determines how many superdelegates each candidate needs. Depending on how the remaining primaries go, Clinton will need about two-thirds of the uncommitted ones to break her way. Problem is, over the last month, superdelegates have broken to Obama by 78 percent to 22 percent.