Blast the Right host, Jack Clark, really puts together a great legalistic argument why immigrants who are working at incredibly low wages have reasonable expectations that they would be able to continue their new lives that they have started here in America.
Equitable estoppel is the excellent new term that I learned. The example of the legal premise that was given on the podcast was that if someone signs a lease that says that you will be charged a penalty fee or evicted if you pay the rent more than 3-4 days but in fact pay the first 6 months paying the rent 10 days late then one could not expect that the seventh month would be the month that your landlord would evict you. In the same manner when the U.S. has Fortune 500 companies seeking out undocumented immigrants to pay them less than the US standard for minimum wage but a greater wage than the average Latin American would be paid in their home countries, that there could be no expectation that undocumented immigrants staying past their visas (which a vast majority of undocumented immigrants do, not jumping the fence) would be prosecuted years after entering the country and putting in 1,000s of hour of hard work into our economy. With a such a strong encouragement to break the letter of the law from supposedly law abiding good corporate citizens like Wal-Mart, Archer-Daniels- Midland Company, Con-Agra, Manpower Inc., and any other company that depends on cheap manual labor why would their be anyone who has to chose between abject-starving poverty and simply being the bottom rung on the American economic ladder chose the former rather than the latter.
Obviously we cannot have anyone who is a violent criminal roaming over the border or taking a flight into our country, but the right-wing doesn't want to implement anything to stopping them. Mohammed Atta, and Richard Reid were on no-fly lists and were able to fly any way (9/11 ringleader and the shoe bomber respectively). The undocumented workers in the houses of right-wing nutjobs (like Rush Limbugh's maid who scored him all those prescription drugs) are the only people the wealthy class warriors want to get rid of, if the right wingers didn't like their own undocumented workers they should have the guts let them go and hire a legal resident (except at $7.25/hour instead of $3-$4/hr).