We don't have to deport them all - all at once.
If we enforce existing laws, they will be forced to leave on their own.
Certainly there's room for improvement to enforce existing laws like you said.
However, as long as there's demand for cheap labor, the market will provide it. So the bulk of 20 Million Mexicans laborers are here to stay, even if we are stringent with our laws.
Honestly, I think it's a waste of time to try to disagree with President Bush on this amnesty or "shamnesty" like you would call it.
The best we can do is to build an Israeli-style Wall of America on the border and leave it at that.
We should focus all our energy on that.