Yes, illegal immigration is a major issue. However vast majority of construction workers and those working in the agricultural industry are illegals, primarily from Mexico. They still play an important role in the economy, and take up a lot of jobs most Americans aren't willing to work. Wish there we had a better labor worker visa program so we could actually tax these people though. I worked in construction a while back in Miami and I was the only non-Spanish speaker in my crew. They work their asses off. We always struggled to find legal laborers so we had to resort to illegals since most Americans bitch about having to work hard under the sun and quit after day one. But still, having a porous border causes lots of issues and allows for rampant human and drug trafficking to happen. Pretty sad.