I support a VERY open immigration policy so these things don't go far enough for my tastes. I firmly believe in the "natural order" of things. I think there are natural systems that when we go against them we cause more problems then we solve. Which is why I believe in things like the free market over central planning and evolution over intelligent design... fewer drug laws and not increasing gun laws. In the case of immigration, no one needs to worry about some mad rush of immigrants right now... our economy sucks and frankly,(for many) it isn't worth the hassle to come here right now.
Make it easy for LEGAL trackable immigration and locking down the border against truly BAD illegals will no longer be a political hot potato and you can start to build walls or use drones or minefields or whatever you feel necessary. (I am all for a shoot on site policy when it becomes a situation where only a truly "bad" person would need to sneak in to the US...)
Immigration is a natural and healthy aspect of our economy and placing too many arbitrary limits and hurdles on it causes far more harm than good (economically speaking). Just one more thing the government screws up when it tries to control it too much.