We DO that by making a REAL committment to a systematic plan which will require ALL undocumented aliens to register OR face immediate deportation when caught without proper validation. AND we impose severe penalties upon employers who hire indocumented aliens.
We can drop a remote machine on Mars, some 70,000,000 miles away from Earth but we can't devise a sytem to do this?? Come now...
Uh, that's exactly the heart of Bush's plan.