Whatever the president calls it, all this constitutes major change to immigration policy right at the very time the country is trying to workthrough comprehensive reform.
So this is not done for anything other than a few extra days to work on getting health care reformthrough the process, as well as keeping that important trip.
The solution to illegal immigration is for Congress to combine a viable immigration enforcement regime with a vastly improved system of legal work visas, either through smaller individual bills or as part of comprehensive immigration reform.