The feds could stop the tide of illegal immigration any time they want. The could have done it decades ago. That the problem still exists means they want it that way. Anything else you hear from them, anything they say, is just smoke screen diverting your attention from that fact.
According to the 2010 census:'
Texas has 1,650,000 illegals which is 6.7% of the population. And 1,100,000 illegals in the workforce which is 9% of the total workforce.
They consume and produce and are part of the Texas economy. There are many jobs built on top of the work done by the illegals.
Don't look for Texas to get rid of them. Guv Perry is not going to send the guard into west Dallas, or north Houston.