I don't know what the Repubs' problem is. Pass a bill that has all the work programs and "partial" amnesty you want COUPLED WITH sealing the borders!
Make it ALLLLLLLLLLLL LEEEGAAAAAAALLL!
What is there not to understand?
The GOP problem is that they are afraid of being called racists and/or bigots by the Left for enforcing the immigration laws. Of course one more terrorist attack and GWB can bend over and kiss his legacy good byyyye...and the GOP can look forward to being the minority party in Congress again... the 'Rats will beat the GOP over the head like a pinata "the GOP failed to secure the borders and now we were attacked AGAIN!"