I belief GWB is doing this out of conviction, not votes. However, if Congress blows the two following stipulations, they are hosed.
"Providing Incentives for Return to Home Country: The program will require the return of temporary workers to their home country after their period of work has concluded. The legal status granted by this program would last three years, be renewable, and would have an end. During the temporary work period, it should allow movement across the U.S. borders so the worker can maintain roots in their home country.
Protecting the Rights of Legal Immigrants: The program should not connect participation to a green card or citizenship. However, it should not preclude a participant from obtaining green card status through the existing process. It should not permit undocumented workers to gain an advantage over those who have followed the rules.