— Even if not prophetic, the choice says something about the presidential nominee. McCain picking Palin underscored his impulsive streak, while Obama's selection of Biden suggests that he was aware of his inexperience.
Romney's pick will reveal something about his nature, too, though it will say more about what he thinks he needs to do to win the election than how he would govern the nation. Despite all the vetting, the key question — will the running mate be up to the rigors and scrutiny of a national campaign? — can't be answered until after the selection is made.