I think the obama campaign is running a bunch of incorrect information out there to get the MSM spun up into a frenzy, and then name someone that hasn't been part of the past 36 hours of insane speculation. it would maximize the impact of his nominee when he finally makes it public.
THAT would be fairly good media management/manipulation.
I think he's doing it to distract them from his craptastic performance Saturday night.
his vote in 2003 for infanticide is getting a lot of attention in the MSM (well, "a lot" for them, anyway). naming his veep will allow them to sweep that under the rug, as well.
that vote is going to be very, very difficult to explain.
