Immigration Opinion

Here's something that would really work badly, but is supported by a plurality of the public according to a Economist/YouGov Poll:

...nearly half (48%) of the public thinks states should be permitted to set their own immigration policies...

How is that supposed to work? Arizona passes an incredibly tough immigration law. Then, lo and behold, Massachusetts passes amenesty and grants citizenship to existing illegals (say, under certain conditions). And then the new citizen takes a vacation to Arizona, where they get put in jail and deported.

Really, it doesn't make any sense.