The DNC just sent out additional speakers for the Convention. Among them, Claire McCaskill and Michelle's brother (and OSU hoops coach) Craig Robinson. Since there's a separate spot for the Veep candidate, I am going to go ahead and boldly predict that McCaskill will not be Obama's choice. I applied this same logic to Hillary. We could also eliminate Robinson, though the veepstake handicappers had him down as something of a longshot to begin with.
Many people regard me as dull-witted; let this exercise of raw intellect dispel the impression.