In one of my first posts on this blog, I observed two things, concluded from the behavior of the players in the Sestak drama; 1) Sestak's story of a bribe attempt was substantially true, and 2) there was evidence that supported his story.
Hence, you have Robert "Fibs" Gibbs dodging questions for months...but carefully avoiding a direct denial. If Sestak was lying, the Obami would have no trouble saying so. If Sestak could not prove his allegations...repeated several times now...the Obami would say he was lying, making it a "he-said-we-say" proposition that would never be determined objectively.
The Obami apparently hoped this story would simply die, perhaps with the complicit press playing the same "silencer" role they played in the nomination and election process. It does not appear to be going away.
Eric Holder is NOT going to appoint a special prosecutor to investigate what is...if true...a flagrant violation of federal law; a felony, indeed. I think he can, in fact, be counted on to turn himself and the DoJ inside out to shield the Administration.
This leaves two or three venues in which this story plays out; Congress (soon or after the mid-terms), the press (but the MSM only reluctantly), and the people (as in TEA Party types who keep the pressure on).