Immigration to a land of immigrants is the purview of the federal government. It was a major Ku Klux Klan issue after WWI, although the Klan had little interest in Latinos except for their tendency to be Catholic — like being a Communist or a homosexual or, say, a Muslim. Yet, somehow the Obama administration has failed to protect the Arizona border, as its tea party governor has said.
For the record, the court found Arizona Law SB 1070 to be unconstitutional (that pesky 14th Amendment, again). Arizona legislators passed it four times when Janet Napolitano was governor and each time Napolitano vetoed it. She became the head of Homeland Security and the governorship went to Jan "headless corpses" Brewer who signed it. Unconstitutional is unconstitutional, no matter what state or by whose signature.
We tend to believe things that support our opinions and disbelieve the things that do not. With such human nature in mind, it is easy to understand the popularity of public opinion polls. The data that polls generate is enormous and critical to estimating what a well-defined target audience is going to favor or reject. Survey data is the life blood of marketing and fundraising.
It is important to remember that the public can change its mind on any issue, and it does. Consider off-shore drilling. The Deepwater Horizon oil disaster in the Gulf of Mexico seems to have changed the opinion of Californians by a 16% swing, from a small majority that favored it to 59% who oppose drilling off the California coast. We know this because it is what the survey said.
No one surveyed me. “Undecided” is not a choice I would make anyway. “Prefer not to say” maybe, but no one asked me, and well they should not have asked me. I do not poll well. Most likely the reason is because I did not go to a mall, or did not answer my phone, or did not click on an online pop-up box. Somehow, I eluded the surveyors, but you can bet I will vote.