There's a while before this bill comes to final form and gets sent to Bush for his signature. It will likely be greatly changed after the House gets it, and there is still plenty of time to let the GOP know that they'll live or die (politically) on this issue.
Even Bush may blanch when he sees how low his approval numbers go after this.
No pro-amnesty candidate has a chance of the nomination, not withthe base this angry, and the field will thin on this issue.
***I sure hope you’re right. I suspect that the reason why this solution was pushed at this time was because the issue has been gathering steam with Tancredo & Hunter giving it the spotlight. Congress passed some kind of immigration bill when Buchanan was making waves and they had to come up with something to calm that crowd. Similarly, they needed to do something before this turned into a real wedge issue. Their political calculation may have backfired — I sure hope so.