I can see that you are somewhat confused and I see why.
You are operating on the premise that "a bill" is necessary - it is NOT.
As has been stated earlier, we have sufficient existing laws on the books to solve the illegal immigration issue.
The point has also been made that illegal immigrants are not nor do they intend to obey those or any other laws we legislate.
Now if you can operate on THAT fact, then you be able to get back on track.
Actually, we don't. We don't have effective laws preventing employers from hiring illegals, and we don't have sufficient ways for them to check. IMO, that's the biggest problem.
We also don't have effective guest worker programs which make sure that the industries (primarily seasonal, but a few others like child care workers and computer programmers) can have the number of workers they need, but not more than the shortage of American workers requires.
We also don't have laws preventing illegal residents from getting welfare - including SSI, health care, EITC, etc.
In many states, illegals can get driver's licenses and even register to vote.
Our current laws (state laws) prevent police from turning illegals over to the Feds if they find that they are indeed illegal.
There's more, but isn't that enough to convince you that we need a change in Fed'l laws?