enforcing federal immigration laws
A pointless and expensive exercise.
If the powers that be wanted to "secure the borders," there would be be "secured." As it turns out, they're busy propping an economy based on debt and phony money, and cheap labor acts as subsidies to hold down prices (to a degree).
But there's another question to be asked: should laws be enforced simply because they are law? Remember the plethora of outdated and nonsensical laws on the books. Should a law against chewing gum in public be enforced? What about jaywalking? What about speeding?
What is the baseline for laws needing to be enforced? And when should they be rightfully ignored?