I still suggest if you ask the average citizen if he thinks it's a good idea to have control of a nation's border, few will say no.
Is it always the number one issue? Depends. How big is Ramos and Compean being played up, how big are issues like terrorists crossing the border being featured in the msm, the effect of illegals on our social structure, hospitals, jails. What does Joe 6-Pack really think about sanctuary cities?
Issues like this can have a lot of punch if featured in the right context by major players in presenting the news, but if ignored they will seem not as important.
Depends...How often does the cashier speak in Spanish to the customers ahead and behind, while saying nada to you. How many times are you sideswiped on the road by a beater car. How many times do you call and get an automated service attendant who explains everything in Spanish before you can press #1? How many times the road or Verizon crews are working in front of your house, (in my case tearing up the lawn) and they don't respond to the question, "What are you doing?" Eeeesh.