It is interesting that McCain's "opposition research" apparatus did not do a THING against Obama in 2008, even with so much dirt to dig, for anybody who wanted to dig.
It reminds me of the famous Sherlock Holmes story where Sherlock remarks:
Gregory (Scotland Yard detective): Is there any other point to which you would wish to draw my attention?(The dog did not bark, because the "intruder" was the dog's owner.)Holmes: To the curious incident of the dog in the night-time.
Gregory: The dog did nothing in the night-time.
Holmes: That was the curious incident.
The only conclusion I can come to, is that McCain's objective was to eliminate all conservative primary challengers, and then take a dive in the general election in favor of Obama, in exchange for some undisclosed quid pro quo.
the dog did nothing,,,
Sherlock.