One of them could also decide to run against Casey.
Which was apparently the whole point of "Gerlach for Governor 2010."
If the GOP takes the State House (which will likely will), they will not throw Gerlach and Meehan into the same district. Absolutely not happening. Meehan is a favorite amongst the party leadership. He has been around for ages and is very well liked.
I don't know what will happen with redistricting in the SE but I know it will be very interesting. I'm just hoping to have the southern border of the 8th district move one street over into Philly (though that won't be happening).