As long as he cooperates with Bush, the Republicans will not challenge this seat -- there are no Republicans running in District 28 in November.  Its the deal with the devil Cuellar has made.

Unless Ciro can somehow get the voters of Webb county to give him another look, or he or another candidate can tap into organizations in Webb, Cuellar has a pretty safe seat.

If Democrats ever take back the House (in my lifetime?) then Cuellar would be forced to change his behavior since the Republicans would be forced to run a candidate against him.  Until then, expect Cuellar to continue to toe the Bush line and for the net community to continue to be frustrated.