He either saw some really bad poll numbers or he's getting wind that the Republicans are going to carve up his district come redistricting time. Either way, I doubt the Dems will hold this district, unless they get a top-tier recruit and the Republicans have one of their moderate/conservative catfights in the primary (which is generally the only way Dems win in Kansas).
The district cannot be made much worse for him without turning KS-02 into a battleground.
KS-01 is 59-39 McCain, the other three districts are around 56-42 McCain. Makes them vulnerable in a particularly bad GOP year, but I'm willing to bet they'd take that risk to make the district safe otherwise.
