It's best for Fitzpatrick. He won Bucks even in 2006.
OK, but it is just so convenient to put some of the heavily Dem lower Bucks precincts into PA-13.
Getting to one of Phil's points...a big player (and pretty ancient too) in Bucks Republican Politics, Harry Fawkes lives in some of the most Democratic territory of Bucks...frankly I'm surprised he hasn't moved North by now...but I guess olds get so attached to home.
Additionally, Fitzpatrick does relatively well in Lower Bucks (he's from there)...sure he won't carry most areas (but its not the end of the world there), and I doubt the GOP can really cleave enough of Lower Bucks (while leaving Fitz in 8 )...unless they use your map!