Unfortunately, neither party has reason to do so. Our government doesn't have the political will, and we don't have the finances to just uproot and toss over every illegal, although if the STATES worked with the feds to discourage illegals, they'd go back home on their own for the most part.
Why should sending them back cost us anything. They own property, cars, TV's, Jewelry, etc......we confiscate what they own, sell it, charge for trip home and to satisfy the liberals, we give them the balance....however for my part, we'd keep it all so they could buy their way right back cross the border.