Having arrived in Chicago to vote and attend a rally tonight, Obama is busy playing the expectations game:

"I still think Senator Clinton is the favorite. She had 20-30 point leads in many of these states, we've been closing some ground," Obama told reporters inside the Beulah Shoesmith Elementary School polling center. "My guess is we'll have a good night and we'll probably end up having a split decision."

Some very surprising things will have to happen today for the decision not to be split -- or perhaps, for the race to end is a better way of saying it.