For those placing bets, he gave three clues:
USA Today, 02:44 PM/ET, August 21, 2008:
Barack Obama told USA TODAY this afternoon that "yes," he has made up his mind about whom his running mate will be -- but he would not reveal the name or just when he will tell the nation about his choice....
Obama said he wanted somebody who is "prepared to be president" and who will be "a partner with me in strengthening this economy for the middle class and working families."
He said he was looking for not just a partner but a sparring partner. "I want somebody who's independent, somebody who can push against my preconceived notions and challenge me so we have got a robust debate in the White House.".....

