While it may be impossible to deport 11 or 20 or 40 million illegals (nobody even cares to know how many), it certainly would be possible to deport the worst 1.1 or 2 or 4 million who are gang-bangers, felons, welfare cheats and the like.
Before you get even halfway with the worst 10%, a good share of the others will self-deport, particularly if you offer incentives such as free air conditioned bus rides and a nice sack lunch for the first x million to report for voluntary deportation, then gradually ratcheting it down to a ride in a box car with straw and cold tortilla and beans paid for by property seizure.
None of this will happen until 2012 so we have two more years to endure under Marxist control from the top and jabbers like the rinos and hard left.