Here's some interesting stats from the Penn vote:

Obama fared better in the largest voting bloc by age, the 50-64 group. In Ohio, that group made up 32% of the electorate, and Clinton won it 60%-37%. This time, the group made up 36% of the electorate, and Clinton won it by a slighter margin, 56%-44%.

The electorate in Pennsylvania is older (second oldest in the country behind Florida). The +65 category was 23% of the vote vs. just 14% in Ohio. But Obama did better with this group in Pennsylvania (63%-37% for Clinton) than in Ohio (72%-26% for Clinton).

Education was another factor. Among those without a college degree, Clinton won 58%-42%, similar to her victory in Ohio, 58%-40%, but more voters in Pennsylvania reported having a college degree (47% vs. 32% in Ohio). And Obama won those voters 51%-49%, a similar margin to Ohio (51%-47%).

Obama also scraped around the margins with every racial demographic, but not enough to pull off the victory. Clinton won white women 66%-34% (47% of the electorate); she won that group 67%-31% in Ohio (44% of the electorate). With the overall white vote, Clinton won it 64%-34% in Ohio and 62%-38% in Pennsylvania. Among white men, Clinton won 58%-39% in Ohio and 56%-44% in Pennsylvania.

Among black voters (13% of the electorate; was 18% in Ohio), Obama won by similar margins in Pennsylvania (89%-11%) as in Ohio (87%-13%).

http://firstread.msnbc.msn.com/archive/2008/04/22/934094.aspx