Wired has a very nice summary of the statistical evidence that shows how badly gerrymandered Pennsylvania has been. It’s interesting for biologists, too — it’s actually a problem in morphology, and detecting bias in the distribution of a field. I once tried to do an analysis of the shape of terminal sensory fields of spinal neurons, and was stymied by a shortage of reliable data (it was hard to get complete labeling of delicate peripheral arbors), but now if I were to repeat it, at least I’d know who to consult for good statistical analysis: political scientists.
And, oh yeah, Pennsylvania Republicans were lousy cheating crooks.