Although Hillary Clinton has an edge in Pennsylvania polls, an analysis by CQ shows that the current numbers would not project out to a huge delegate advantage. Of the 103 pledged delegates distributed at the district level -- another 55 will be allocated by statewide popular vote -- Clinton so far has an advantage of only 53 delegates to Obama's 50.

Assuming the statewide delegates closely match with the district votes, Clinton will need to seriously increase her lead at all levels in order to really put any kind of dent in Obama's pledged-delegate advantage.