Why is it on every other issue these same folks want to give more power to the federal government and away from the states. This is actually one of the federal governments enumerated powers unlike so many other wonderful inventions such as the Department of Education. That said it is not the job of local employees to enforce federal law. The feds need to step up and take care of their own responsibilities. They’re being paid to do so. The locals are not. Locals should not be required to fund or use their manpower to deal with these problems but at the same time should be dealt with accordingly if they obstruct efforts to bring unlawful subjects to justice.