This district was drawn for John Murtha. I predict it will be gone once our new legislature starts redistricting. The RAT establishment just poured a lot of money into (barely) saving their boy Mark Critz for one term.
That district was drawn by Republicans not "for John Murtha" at all but for the purposes of:
1. Putting 2 Rat incumbents (John Murtha and Frank Mascara) into one district while eliminating the old 20th district entirely, and
2. Jamming enough Rat voters into that new 12th district to shore up Republicans in the adjacent 4th and 18th districts (we also added more Rats to the 14th district, which also helped the 4th & 18th).
Republicans will control the process again this decade, and it looks like we need to get even MORE help into the 4th district to exterminate Weasel Altmire (and more into the 12th to screw Critz), while not endangering the 18th. It can be done, but the result might look even more like an out-of-control jigsaw puzzle piece.