Philadelpha county is HEAVILY skewed toward Democrats. Were it not for that county, Bush would have won handily. Bush only got 19% of the vote there and Specter managed to get 28%.
University-count contributes to that (resident staffs, faculty & some students), then minorities, then "Catholic" dems. Might be worthwhile to concentrate on the college population not just through YAF, YR, CR but through parents, ROTC programs, corporate lecture (and JOB) programs ?