Marc Ambinder has some sage advice to those handicapping the veepstakes race:
One Hill source who has been reliable in the past says that his/her boss was specifically asked about Sen. James Webb. In general, I shouldn't, and you shouldn't, read too much into this early Galivanting-Sans-Caroline Kennedy. If history is any guide, most of the names floated are courtesies, and a large number of short-listers don't show up in the first round.
Running-mates rarely make much of an impact on the horse race, but in a year that I think will be tighter than many now realize, the choice of running-mates might actually make the difference. This will likely be neither a quick nor easy decision for Obama to make.