The numbers are out and Pennsylvania will lose one congressional seat
resulting from reapportionment. That is pretty much what has been predicted most of the last decade so it is not a suprise. If only more of those Marcellus Shale workers flying reported their ususal residence
as Pennsylvania. In fairness it was not that close and probably a dozen states came in closer to gaining a seat relative to how the numbers came out before Pennsylvania would have retained its 19th congressional district. There is always the next cycle.
Question lots are asking is which incumbent, or which district will go away. The short answer is that with one district being removed from the Pennsylvania map, you will see significant boundary changes to all congressional districts. There is basically no way you can take out any one congressional district and not have it cause secondary impacts in all the others within the state.
Working image appended below fyi...