If Obama is already leaving the state before the polls have even closed, then his loss must be significant. He is not bothering to rally anyone. I find it interesting that he is going to Indiana, not North Carolina, but not surprising. He obviously feels a need to shore up support in Indiana in the face of the Pennsylvania news.
Update - The official Pennsylvania election results will be posted here. It has the primary contests, but also some downticket results. I am curious to see the degree of vote fall-off from the Democratic primary. Most party races are single candidate, so people may not feel a need to offer a choice, but in contested races, I'm curious to see which areas show the most voter fall off.